Odpowiedź:
a) 2x+5
2*(-4) +5= (-8)+5=(-3)
b) -7-3y
-7- 3*3= -7-9=-16
c)2x+3y-5
2*(-8)+3*4-5=-16+12-5=-4+5=1
d)1/4a(a-7)
1/4*12(12-7)=3*5=15
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Odpowiedź:
a) 2x+5
2*(-4) +5= (-8)+5=(-3)
b) -7-3y
-7- 3*3= -7-9=-16
c)2x+3y-5
2*(-8)+3*4-5=-16+12-5=-4+5=1
d)1/4a(a-7)
1/4*12(12-7)=3*5=15