Question

URGENT
DAU COROANA
(x+6)(x-1)+(2x-3)²-5(x²-2x)???​

Answer 1

Răspuns:

3(x+1)

Explicație pas cu pas:

(x+6)(x-1)+(2x-3)²-5(x²-2x) = ?

(x+6)(x-1) = x²-x+6x-6 = x²+5x-6

(2x-3)² = 4x²-12x+9

Aici am folosit formula :

(a-b)² = a²-2ab+b²

5(x²-2x) = 5x²-10x

(x+6)(x-1)+(2x-3)²-5(x²-2x) =

= x²+5x-6 + 4x²-12x+9 - 5x²+10x =

= x²+4x²-5x² + 5x-12x+10x -6+9 =

= 3x+3 = 3(x+1)