Question

(X + 5)² - (x+3) ⋅ (x-1) ⋅ (x - 2)² =
repede va rog! dau coroana
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(x+5)²=
(x×3)=
(x-1)=
(x-2)²=​

Answer 1

(x+5)² = x²+10x+25

(x+3)(x-1) = x²-x+3x-3 = x²+2x-3

(x-2)² = x²-4x+4

=> x²+10x+25 - (x²+2x-3)(x²-4x+4) =

x²+10x+25 - (x⁴-4x³+4x²+2x³-8x²+8x-3x²+12x-12) =

x²+10x+25-x⁴-2x³+7x²-20x+12