Question

oblicz wartosci liczbowe wyrazen

A.3(x^2-2x+3)-2(x^2-5x-1)dla x=2

B.a(2ab+b)-b(a-2ab+a^2)dla a=0,1i b=-10

Answer 1

a) dla x=2

3·(x²-2x+3)-2(x²-5x-1)=3x²-6x+9 -2x²+10x+2=x²+4x+11

2²+4·2+11=4+8+11=23

 

b)dla a=0,1  b=-10

 

a(2ab+b)-b(a-2ab+a²)=2a²b+ab-ab+2ab²-a²b=a²b+2ab²

(0,1)²·(-10)+2·0,1·(-10)²=0,01·(-10)+0,2·100 =-0,1+20=19,9