Question

calculaţi suma diferenţa produsul P(X)=x²-2x+7 Q(X)=x²-7​

Answer 1

P(X)+X²-5X+7=3X²+2X-1
P(x)=(3x^2+2x-1)-(x^2-5x+7)
P(x)=3x^2+2x-1-x^2+5x-7
P(x)=2x^2+7x-8

Answer 2

Explicație pas cu pas:

P(X)=x²-2x+7

$x = - \frac { - 2}{21} = > x = 1$

$p(1) = 6$

x=1,6

Q(X)=x²-7

$x = - \frac{0}{2 \times 1} = > x = 0$

$q(0) = - 7$

Q(X)=(0,-7)

Succes!