jika x^2+x-5=0 maka (2x+1)^2 = . . .
Matematika
ulinaroma
Pertanyaan
jika x^2+x-5=0 maka (2x+1)^2 = . . .
1 Jawaban
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1. Jawaban arsetpopeye
x^2 + x - 5 = 0
=> x^2 + x = 5
(2x + 1)^2 = 4x^2 + 4x + 1
= 4(x^2 + x) + 1
= 4(5) + 1
= 20 + 1
= 21