(2x+1/2)^2-(X-1/2)^2
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Step-by-step explanation:
(2X+1/2)^2 - (X-1/2)^2
=[(2X)^2+2×2X×1/2+(1/2)^2] - [(X)^2-2×X×1/2+(1/2)^2]
=[4X^2+2X+1/4] -[X^2-X+1/4]
=4X^2+2X+1/4-X^2+X-1/4
=3X^2+3X
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