1/2×3.7²-3.7×2.7+1/2×2.7²因式分解

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1/2×3.7²-3.7×2.7+1/2×2.7²因式分解
1/2×3.7²-3.7×2.7+1/2×2.7²因式分解

1/2×3.7²-3.7×2.7+1/2×2.7²因式分解
1/2 X 3.7" - 3.7 X 2.7 + 1/2 X 2.7"
= ( 1/2 ) X ( 3.7" - 2X 3.7X 2.7 + 2.7" )
= ( 1/2 ) X ( 3.7 - 2.7 )"
= ( 1/2 ) X 1"
= 1/2