Question

simplify poloynomial
$(8 {x}^{2} - 12 + 3x) - (9 {x}^{2} + 7 - 11x)$
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Answer 1

$\Huge{\textbf{\textsf{{\purple{Ans}}{\pink{wer}}{\color{pink}{:}}}}}$

$(8 {x}^{2} - 12 + 3x) - (9 {x}^{2} + 7 - 11x) \\ = 8 {x}^{2} - 12 + 3x- 9 {x}^{2} - 7 - + 11x \\ = - {x}^{2} + 14x - 19$

Note:

$( + ) \times ( + ) = + \\ ( - ) \times ( - ) = + \\ ( - ) \times ( + ) = - \\ ( + ) \times ( - ) = -$