Question

(9x+a)(x+b) is equal to​

Answer 1

9x(x+b)+a(x+b)

=9x^2 + 9bx+ax+ab

=9x^2+x(9b+a)+ab

Answer 2

$\red{ \huge{ \underline{ \overline{ \mid{ \bold{ \purple{ \: \: SOLUTION \: \: \red{ \mid}}}}}}}}$

$\underline{ \underline{ \bold{ \: \: TO \: \: FIND\: \: }}} \: \to \: \: \: \: \bold{(9x + a)(x + b) = ? }$

$\bold{(9x + a)(x + b)} \\ \\ \bold{ = 9x(x + b) + a(x + b)} \\ \\ \bold{ = 9x {}^{2} + 9xb + ax + ab} \\ \\ \bold{ = 9x {}^{2} + ax + 9bx + ab} \\ \\ \bold{ = 9x {}^{2} + (a + 9b)x + ab }$