Question

Ex 9 prima coloana va rog

Answer 1

Răspuns:

a²-b²= (a-b)(a+b)

(x+1)²-3²=(x+1)(x+1)-3²=x²+2x-8=(x-2)(x+4)

(x-5)²-4²=x²-10x+9=(x-9)(x-1)

(2x+1)²-3²=4x²+4x-8=4(x-1)(x+2)

(4x+1)²-6²=16x²+8x-35=(4x-5)(4x+7)

(x+2)²-5²=x²+4x-21=(x-3)(x+7)

(y-2)²-8²=y²-4y-60=(y-10)(y+6)

(3x-4)²-1²=9x²-24x+15=3(x-1)(3x-5)

25-(2x+3)²=25-(2x+3)(2x+3)=-4(x-1)(x+4)

Answer 2

Răspuns:

Explicație pas cu pas: