what is the standard form of the quadratic equation 2x + (x - 4)(x + 1) = 9?
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Answer:
X²-x-13=0
Step-by-step explanation:
2x+(x-4)( x+1)=9
2x+x²+x-4x-4=9
x²-x-13=0
Step-by-step explanation:
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