Question

Jika a-b=12 dan a+b=6 maka nilai a²-b²=

Answer 1

A^2-b^2 = (a+b)(a-b)
a^2-b^2 = 6 x 12 = 72

Answer 2

A-b=12
a+b=6
_______-
-2b=6
b=6/-2
b=-3

a+(-3)=6
a-3=6
a=6+3
a=9

jadi a=9 b=-3

a kuadrat - b kuadrat =
9 kuadrat - (-3) kuadrat=
81 - (9)=72