Explanation:
(2x+3)2
=(2x+3)(2x+3)
=(2x)(2x)+(2x)(3)+(3)(2x)+(3)(3)
=4x2+6x+6x+9
=4x²+12x+9
12.(x−5)2
=(x+−5)(x+−5)
=(x)(x)+(x)(−5)+(−5)(x)+(−5)(−5)
=x2−5x−5x+25
=x²−10x+25
13.((2)(3))2
=6×6
=36
14.4−5x)2
=(4+−5x)(4+−5x)
=(4)(4)+(4)(−5x)+(−5x)(4)+(−5x)(−5x)
=16−20x−20x+25x2
=25x²−40x+16
15.(x2+3y)(2)
=(x2+3y)(2)
=(x2)(2)+(3y)(2)
=2x²+6y
