(x+1/2)^2-1/4-3
=(x+1/2)^2-13/4
(x-7/2)^2-49/4+1
=(x-7/2)^2-45/4
2(x^+8x)-20
=2((x+4)^2-16)-20
=2(x+4)^2-32-20
=2(x+4)^2-52
3(x^2+6x)+32
=3((x+3)^2-9)+32
=3(x+3)^2-27+32
=3(x+3)^2+5
この2つの問題が分からないので解説お願いします😭
(x+1/2)^2-1/4-3
=(x+1/2)^2-13/4
(x-7/2)^2-49/4+1
=(x-7/2)^2-45/4
2(x^+8x)-20
=2((x+4)^2-16)-20
=2(x+4)^2-32-20
=2(x+4)^2-52
3(x^2+6x)+32
=3((x+3)^2-9)+32
=3(x+3)^2-27+32
=3(x+3)^2+5
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