Question

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Answer 1

Răspuns:

E(x)= 4$x^{2}$ +12x+ 9 - ($x^{2}$ +7x - 3x - 21) - 2*( $x^{2}$- 4x+2)=

4$x^{2}$ +12x+9 - $x^{2}$ -4x +21 - 2$x^{2}$ +8x-4= $x^{2}$ +16x +36

E(x)= $x^{2}$ +16x +36

E(0)= 0+16*0+36= 36

E(-2)= 4-16*2+36= 40-32=8

E(-3)=9-16*3+36= 45-48= -3