1. (x-5)(x+5) 2. (2x+8)(2x-8) 3. (3x-2)(3x-2) 4.(2x+5)(2x+5) (bantu Jawab ya!!!sekalian pake cara nya)

1).(x-5)(x+5)
=x(x+5)-5(x+5)
=x²+5x-5x-25
=x²-25
2).(2x+8)(2x-8)
=2x(2x-8)+8(2x-8)
=4x²-16x+16x-64
=4x-64
3).(3x-2)(3x-2)
=3x(3x-2)-2(3x-2)
=9x²-6x-6x+4
=9x²-12x+4
4).2x(2x+5)+5(2x+5)
=4x²+10x+10x+25
=4x²+20x+25