Question

find the product.
(i). (5-2×)(3+×)
(ii). (×+7y)(7×-y)​

Answer 1

Answer:

$i) \: \: (5 - 2x)(3 + x)$

$5(3 + x) - 2x(3 + x)$

$15 + 5x - 6x - {2x}^{2}$

${ - 2x}^{2} - x + 15$

${2x}^{2} + x - 15$

$ans. \: \: {2x}^{2} + x - 15$

$ii) \: \: (x + 7y)(7x - y)$

$x(7x - y) + 7y(7x - y)$

${7x}^{2} - xy + 49xy - {7y}^{2}$

${7x}^{2} + 48xy - {7y}^{2}$

$ans. \: \: {7x}^{2} + 48xy - {7y}^{2}$

Hope it helps.

Answer 2

$\huge{\underline{\underline{\bf{ SoLuTiOn\: - }}}}♡⇒$

°°° Explanation °°°

(5−2x)(3+x)=5(3+x)−2x(3+x)

=15+5x−6x−2x2

=−2x2−x+15