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(3x-5)(x+2)-2(x+1)(2x-3)
(3(-1,5)-5)((-1,5)+2)-2((-1,5)+1)(2(-1,5)-3)=(-9,5)*0,5-(-1)*(-6)=-10,75
-10,75= -10 3/4
d) dla x=-2 1/2= -2,5
3(3x-1)(4+2x)-4(x+3)(4x-1)
3(3(-2,5)-1)(4+2(-2,5))-4((-2,5)+3)(4(-2,5)-1)=(-25,5)*(-1)-2*(-11)=47,5
47,5= 471/2