Question

Ini caranya gimana?? tolong dibantu dongg secepatnya yahh

Answer 1

A.(x+5)(x-5)
=x²-5x+5x-25
=x²-25

b.(x-7)(x+7)
=x²+7x-7x-49
=x²-49

c.(2a+6)(b-3)
=2ab-6a+6b-18
=2ab-18

d.(x-11)(3x+9)
=3x²+9x-33x-99
=3x²-24x-99

e.(5a+5)(7b-7)
=35ab-35a+35b-35

f.(x+9)(x+4)
=x²+4x+9x+36
=x²+13x+36

Answer 2

A.x²  -25
b.x²  -49
c.2a(b-3)+6(b-3)=2ab-6a+6b-18
d.x(3x+9)-11(3x+9)=3x²+9x-33x-99=3x²-24x-99
e.5a(7b-7)+5(7b-7)=35ab-35a+35b-35
f.x²+13x+36