tolong dijawab no. 5,6,7,8,12,14!!please pake cara!

5)
=(x-10)×(x-10)
=x²-10x-10x+100
=x²-20x+100

6)
=(3x+4)×(3x+4)
=9x²+12x+12x+16
=9x²+24x+16

7)
=(5x-7)×(5x-7)
=25x²-35x-35x+14
=25x²-70x+14

8)
=(-7x+3)×(-7x+3)
=49x²-21x-21x+9
=49x²-42x+9

12)
=(7p²-4p)×(7p²-4p)
=49p⁴-28p³-28p³+16p²
=49p²-56p³+16p²

14)
=(3m-1/2m)×(3m-1/2m)
=9m²-3m/2m-3m/2m+1/4m²
=9m²-6/2m+1/4m²