✨ Best Answer ✨
(1)
2x²-18x=x²-9x-18
x²-9x+18=0
(x-3)(x-6)=0
x=3,6
(2)
x-x²=-20
x²-x-20=0
(x+4)(x-5)=0
x=-4,5
Mathematics
Junior High
Solved
教えてください！二次方程式の問題です！(ᐢ ܸ. .ܸ ᐢ)՞ ՞(ᐢ ܸ. .ܸ ᐢ)՞ ՞
6 次の二次方程式を解きなさい。
□(1) 2(x2-9x)=x2-9x-18
□ (2) x(1-x)=-20
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