Question

Evaluate using identity (x+8) (x-10​

Answer 1

Answer:

$( x + 8)(x - 10) \\ x(x + 8) - 10( x + 8) \\ {x}^{2} + 8x - 10x - 80 \\ {x}^{2} - 2x - 80$

Step-by-step explanation:

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Answer 2

Answer:

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

(x+8 ) ( x -10) = (x^2)^2 + (8-10) x- (8×-10)

= x^4 + (-2) x- (-80)

=x^4+ ( -2x) +80

= x^4 -2x +80

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