Question

evaluate( 2x-1x ) (5x +6x)

Answer 1

here is ur answer mate

$10x {}^{2} + 12x {}^{2} - 5x {}^{2} - 6x {}^{2} \\ 22x {}^{2} - 11x {}^{2} \\ 11x {}^{2}$
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Answer 2

2x × 5x + 2x × 6x - 1x × 5x -1x×6x
= 10x^2+ 12x^2 -5x^2-6x^2
22x^2 - 11^2
= 11^2 ans.