The mistake was made in the 2nd working line, -5 x (-2y ) = 10y ( POSITIVE ), not negative. Also in the 3rd working line, it is 6x^2 not 6x. He/She forgot the exponent. Also, -2y + ( -10y ) = -2y-10y = -12y. But in the working statement he/she wrote -8y.

The mistake made in the workings are: 2nd line: 10y is positive, not negative as -5(-10y) will be positive (negative + negative =positive) 3rd line: 6x should have the square (6x^2)

the first line has -5 x 3x and -5 times -2y so the second line is wrong because it should have been plus instead of minus. the third line is also wrong because it is simplified wrongly as 6x square cannot be simplified to 6x and 2xy cannot be simplified to 2y

In the second line, it should not be -10y but 10y (positive). It is because when -5 x -2y, the answer will be positive as it is two negatives multiplied by each other.

An error is in line 2 as -5*-2 is positive 10 not negative.Another error is the third line as the six lost its square when it shoudn't have.Thus the answer is wrong.

For the second line, -5 x -2 =10(negative+negative=positive) For the third line, 6x^2 - 2xy cannot be simplified into 6x-2y. We can only subtract when there is like terms.(e.g.exponent,power)

The mistake was made in the 2nd working line, -5 x (-2y ) = 10y ( POSITIVE ), not negative.

ReplyDeleteAlso in the 3rd working line, it is 6x^2 not 6x. He/She forgot the exponent.

Also, -2y + ( -10y ) = -2y-10y = -12y. But in the working statement he/she wrote -8y.

The mistake was made in the 2nd and 3rd line.

ReplyDelete2nd line: -5 times -2y equals to positive 10y, not negative.

3rd line: It isn't needed

Mistake is in the 2 and 3 line the x2 disappeared in from the 3 line and the xy the x also disappeared.

ReplyDeleteThe mistake made in the workings are:

ReplyDelete2nd line: 10y is positive, not negative as -5(-10y) will be positive (negative + negative =positive)

3rd line: 6x should have the square (6x^2)

the first line has -5 x 3x and -5 times -2y so the second line is wrong because it should have been plus instead of minus. the third line is also wrong because it is simplified wrongly as 6x square cannot be simplified to 6x and 2xy cannot be simplified to 2y

ReplyDeleteFor the second line, -5 x -2 = +10 , not -10 .

ReplyDeleteFor the third line, 6x square - 2xy cannot be simplified into 6x-2y

The mistake is on the second line.

ReplyDeletein second line,the (-5)x(-2)is 10y,because negative x negative is positive.

Second Line : -10y is the mistake. (-5*-2y=10y), because -*-=+.

ReplyDeleteIn the second line, it should not be -10y but 10y (positive). It is because when -5 x -2y, the answer will be positive as it is two negatives multiplied by each other.

ReplyDeleteMistake in 2nd and 3rd line

ReplyDelete2nd line: 10y should be positive not negative

3rd line: exponent for 6x is missing. It should be 6x^2

The mistake is on the second line. Since negative times negative is positive, (-5) x (-2) is 10y, not -10y.

ReplyDelete2nd Line: It should be 15x+10x instead of 15x-10x.

ReplyDelete3rd Line: Unnecessary.

An error is in line 2 as -5*-2 is positive 10 not negative.Another error is the third line as the six lost its square when it shoudn't have.Thus the answer is wrong.

ReplyDeleteNegative 5 multiply by Negative 2y equals to Positive 10y instead of Negative 10y.

ReplyDeleteIt is not 6x but 6x^2

The answer is 6x^2+2xy-15x-10y

For the second line, -5 x -2 =10(negative+negative=positive)

ReplyDeleteFor the third line, 6x^2 - 2xy cannot be simplified into 6x-2y. We can only subtract when there is like terms.(e.g.exponent,power)

missed out 6x^2 <- the power (line 3)

ReplyDelete-5y x (-2y) = 10y (line 2)

it is 2xy not 2y (line 3)

-5y x (-2y)=10y(line 2), not -10y as negative times negative is positive

ReplyDeleteshould be 6x^2, missed out the ^2, 2x+10x=12x & the x from the 2xy(line 3)

The mistake is at the second line, where the -10y is suppose to be positive because negative x negative = positive.

ReplyDeleteSecond line, negative x negative equals to positive, so -10y should be +10y.

ReplyDelete