Question

Oblicz wartości liczbowe wyrażenia:
3(x²-2x+3)-2(x²-5x-1) dla x=2

Answer 1

3(x²-2x+3)-2(x²-5x-1) dla x=2
3(2²-2*2+3)-2(2²-5*2-1)
3(4-4+3)-2(4-10-1)
12-12+9-8+20+2
0+1+22
23

Answer 2

3(x²-2x+3)-2(x²-5x-1) =3( 2² - 2× 2 +3 ) -2 ( 2²-5 × 2 - 1) (3×4)-4+3-(2×4)-10-1= 12-7-8-10-1 = (-14)

dla x=2

Answer 3

3(x²-2x+3)-2(x²-5x-1) dla x=2

3(2²-2*2+3)-2(2²-5*2-1) = 3(4-4+3)-2(4-10-1) = 12-12+9-8+20+2 = 0+1+22 = 23