Question

みり

解き方教えてください！

(2) 0.75+2×0.75x0.25t0.25°
-1.35+2×1,35×0.35-0.35°

式の展開 因数分解

Answer 1

torel

0.75²+2×0.75×0.25+0.25²-1.35²+2×1.35×0.35-0.35²
=0.75²+2×0.75×0.25+0.25²-(1.35²-2×1.35×0.35+0.35²)
=(0.75+0.25)²-(1.35-0.35)²
=1²-1²=0