Question

Please it's urgent Please​

Answer 1

Step-by-step explanation:

First Sum:-

$({5x}^{2} + 4xy) + ( { - 3x}^{2} + 2xy) \\ = {5x}^{2} +4xy+ {3x}^{2} +2xy \\ = ( {5x}^{2} + {3x}^{2} )+(4xy+2xy) \\ = {8x}^{2} +6xy</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>$

Then do the crazy subtraction:-

$( {8x}^{2} + 6xy) - ( {4x}^{2} - 7xy) \\ = {8x}^{2} +6xy− {8x}^{2} +7xy \\ = ( {8x}^{2} − {4x}^{2} )+(6xy+7xy) \\ = {4x}^{2} +13xy</p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p></p><p>$

This is the answer of the above question.

Answer 2

I don't want to say any things to other but the second answer of this question is wrong..he /she did the sum wrong.

Here is my answer..

Firstly,let us calculate the sum of 5x²+4xy and -3x²+2xy

= 5x²+4xy + -3x² +2xy

= 2x² + 6xy

Asked,

By how much 4x²- 7xy exceeds the sum of 5x² + 4xy and -3x² + 2xy

Means,

(4x²-7xy) - [(5x² + 4xy) + (-3x² +2xy)]-----(1)

Therefore,

We need to calculate the value of above expression..

Since we calculated the value of 5x² + 4xy + (-3x² + 2xy) which is 2x² +6xy

So, putting the value of sum in equation (1)

= (4x² -7xy) -(2x² +6xy )

= 4x² - 7xy -2x² - 6xy

= 2x² - 13xy

Thank you so much for following me..