Question

Ajutati-ma va rog mult sa desfac parantezele comform formulelor prescurtate :
a) f(x)=4(x-1)²
b) f(x)=-2(x+3)²
f) f(x)=3(x-4)² +5

Answer 1

a) f(x)=4(x-1)²=4(x²-2x+1)=4x²-8x+4
b) f(x)=-2(x+3)²=-2(x+6x+9)=-2x-12x-18
f) f(x)=3(x-4)² +5 =3(x²-8x+16)+5=3x²-24x+48+5=3x²-24x+53

Answer 2

a)$4(x^2-2x+1)=4x^2-8x+4 \\ b)-2(x^2+6x+9)=-2x^2-12x-18 \\ f)3(x^2-8x+16)+5=3x^2-24x+53$