x^2-8x
=(x-4)^2-16
x^2+2x+3
=(x+1)^2-1+3
=(x+1)^2+2
2x^2+8x-1
=2(x^2+4x)-1
=2((x+2)^2-4)-1
=2(x+2)^2-8-1
=2(x+2)^2-9
Mathematics
Senior High
ここの問題の解き方教えて欲しいです。
5. 次の式を y=a(x-p)2+gの形に変形せよ.
(1)y = x² - 8x
(3)y = 2x²+8x - 1
=2(x² +
x)-1
(2)y = x²+2x+3
=2{(x+ )2}-1
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