(0.2x+_)²=_+2x+.(+1)²=9/25x²+__.

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(0.2x+___)²=___+2x+____.(__+1)²=9/25x²+____.(0.2x+___)²=___+2x+____.(__+1)²

(0.2x+___)²=___+2x+____.(__+1)²=9/25x²+____.
(0.2x+___)²=___+2x+____.(__+1)²=9/25x²+____.

(0.2x+___)²=___+2x+____.(__+1)²=9/25x²+____.
(0.2x+_5__)²=_0.04x²__+2x+_25___.
(_3x/5_+1)²=9/25x²+_6x/5+1___.

(0.2x+__5_)²=_0.04x²__+2x+_25___. (_3/5x+1)²=9/25x²+__6/5x²__. + 1