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4 * (3a - 4) = 4 * (3 * 1 - 4) = 4 * (3 - 4) = 4 * (-1) = -4
b)
5 * (3a + 2) = 5 * (3 * 2 + 2) = 5 * (6 + 2) = 5 * 8 = 40
c)
x - 3y - 1 = 5 + 3 * 2 - 1 = 5 + 6 - 1 = 10
d)
(x - 3) * (y + 7) = (-2 - 3) * (3 + 7) = (-5) * 10 = -50
4*(3*1-4)=4*(3-4)=4*(-1)=-4
b) 5*(3a+2) dla a=2
5*(3*2+2)=5*(6+2)=5*8=40
c) x+3y-1 dla x= 5 i y=2
5+3*2-1=5+6-1=10
d) (x-3)*(y+7) dla x= -2 i y=3
(-2-3)*(3+7)=-5*10=-50