1. (2x + 3y)² = (2x + 3y) (2x + 3y)
= 4x²+6xy+6xy+9y² = 4x²+12xy+9y²
2. (4-5x) (4+5x) = (-5x+4) (5x+4)
= -25x² + -20x + 20x + 16 = -25x² + 16
Explanation:
2. rearrange the first step to make (4-5x)(4-5x) turn into (-5x+4)(5x+4). And obviously, for the final answer -20x +20x is = 0 kaya -25x²+16 po.
nag share lang po ako sorry kung may pagkakamali.
