Which of the following is a quadratic equation?
x² - 1) = (2-x)² - 3
3
000
2x + 3 = (5 + x)(2x-3)
None of the above
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Answer:
D. 2x+3=(5+x)(2x-3)
Step-by-step explanation:
because 2x+3 = 10x+2x^2-15-3x
2x+3 = 2x^2+7x-15
2x^2+5x-18 = 0
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