-4x-4 equals -16.
Add 4 to both sides; -4x equals -12.
Divide both sides by -4; x equals 3.
8
4+4=8.... and 4x4=16
4x4
16
8x2 DUH
4x4 = 16 is a perfect square.
Non-prime squares
1x16, 2x8, 4x4
1x16=16 2x8=16 4x4=16 sorry! all i know!
1x16=16 2x8=16 4x4=16 sorry! all i know!
1x16 2x8 4x4
It's not, 4x4=16.
4 times 4 does not equal 20, it equals 16. 5 times 6 equals 30.