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a fost răspuns

(x-1) (x+2)=
(x+2) (x+3)=
(x+1) (x+5)=
(2x+1) (x+1)=
(2x+1) (x+1)=
5x(x+2)=
7x(2x-1)=
2x(x+5)=
3x(x-10)=
4x(x la puterea 2 +1)=
URGENT!!! DAU COROANA!!!

Răspuns :

Maverickarcher

(x-1)(x+2) = x²+2x-x-2 = x²+x-2

(x+2)(x+3) = x²+3x+2x+6 = x²+5x+6

(x+1)(x+5) = x²+5x+x+5 = x²+6x+5

(2x+1)(x+1) = 2x²+2x+x+1 = 2x²+3x+1

5x(x+2) = 5x²+10x

7x(2x-1) = 14x²-7x

2x(x+5) = 2x²+10x

3x(x-10) = 3x²-30x

4x(x²+1) = 4x³+4x

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