Question

Упростите выражение (х-8)²-4х(-5х-8)

Answer 1

$(x - 8) ^{2} - 4x( - 5x - 8) =$

$= (x - 8)(x - 8) - 4x( - 5x - 8) =$

$= {x}^{2} - 16x + 64 + 20 {x}^{2} + 32x =$

=$21 {x}^{2} + 16x + 64.$

Ответ :

$21 {x}^{2} + 16x + 64.$

Answer 2

(x - 8) ^{2} - 4x( - 5x - 8) =(x−8)

2

−4x(−5x−8)=

= (x - 8)(x - 8) - 4x( - 5x - 8) ==(x−8)(x−8)−4x(−5x−8)=

= {x}^{2} - 16x + 64 + 20 {x}^{2} + 32x ==x

2

−16x+64+20x

2

+32x=

=21 {x}^{2} + 16x + 64.21x

2

+16x+64.

Ответ :

21 {x}^{2} + 16x + 64.21x

2

+16x+64.