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x=-2
2×(-2)+11=-4+11=7
x=1
2×1+11=2+11=13
x=-1
2×(-1)+11=-2+11=9
x=-1,5
2×(-1,5)+11=-3+11=8
a) 3*(-2)²+2(-2)-1=3*4-3-1=8
b)3+2-1=4
c)3*(-1.5)²+2(-1.5)-1=3*2.25-3-1=0.5
3 * (-2 ) *4 + 2 * (-2) - 1 = -24 + (-4) -1 = - 29
b) 3*1*4+2-1=13
c) 3 * ( -1,5) * 4 + 2 (-1,5) -1 = - 18 - 4 = - 22