因式分解:80×3.5²+160×3.5×1.5+80×1.5²
问题描述:
因式分解:80×3.5²+160×3.5×1.5+80×1.5²
答
80×3.5²+160×3.5×1.5+80×1.5²
=80×(3.5²+2×3.5×1.5+×1.5²)
=80×(3.5+1.5)²
=80×5²
=2000
答
80×3.5²+160×3.5×1.5+80×1.5²
=80*(3.5^2+2*3.5*1.5+1.5^2)
=80*(3.5+1.5)^2
=80*25
=2000
答
80×3.5²+160×3.5×1.5+80×1.5²
=80×(3.5²+2×3.5×1.5+1.5²)
=80×(3.5+1.5)²
=80×5²
=400×5
=2000