Question

find the following products of the following

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Answer 1

Answer:

There are so many questions so I will solve only some of these questions.

$1.)(x + 7)( {x}^{2} - 3x + 2) \\ = x( {x}^{2} - 3x + 2) + 7( {x}^{2} - 3x + 2) \\ = {x}^{3} - 3{x}^{2} + 3x + 7 {x}^{2} - 21x + 14 \\ = {x}^{3} - 3 {x}^{2} + 7 {x}^{2} + 3x - 21x + 14 \\ = {x}^{3} + 4 {x}^{2} - 18x + 14$

2.) , 3.) , 4.) ,6.) and 7.) part are same as 1.) that I have soved above .

$5.)(2x + 3y)(4x - 9y) \\ = 2x(4x - 9y) + 3y(4x - 9y) \\ = 8 {x}^{2} - 18xy + 12xy - 27 {y}^{2} \\ = 8 {x}^{2} - 6xy - 27 {y}^{2}$

$8.)( \frac{1}{4} {x}^{2} - \frac{1}{5} {y}^{2})(4 {x}^{2} + 5 {y}^{2} ) \\ = \frac{1}{4} {x}^{2} (4 {x}^{2} +5 {y}^{2} ) - \frac{1}{5} {y}^{2} (4 {x}^{2} + 5 {y}^{2} ) \\ = {x}^{4} + \frac{5}{4} {x}^{2} {y}^{2} - \frac{4}{5} {x}^{2} {y}^{2} - {y}^{4} \\ = {x}^{4} + \frac{25 {x}^{2} {y}^{2} - 16 {x}^{2} {y}^{2} }{20} - {y}^{4} \\ = {x}^{4} + \frac{9 {x}^{2} {y}^{2} }{20} - {y}^{4}$

9.) and 10.) are similar to 8.) part which I have solved above

and

from next time give more marks for this type of long questions

I hope it will help you

Answer 2

Answer:

thank u for free points ☺️