what is standard form of quadratic equation 2x+(x-4)(x+1)=9?
a.x²-x-13=0
b.x²+x+13=0
c.x²-5x=0
d.x²-5x-13=0
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what is standard form of quadratic equation 2x+(x-4)(x+1)=9?
a.x²-x-13=0
b.x²+x+13=0
c.x²-5x=0
d.x²-5x-13=0
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Answer:
letter A
Step-by-step explanation:
2x+(x-4)(x+1)=9
2x+x^2 +x-4x-4-9=0
x^2+2x+x-4x-4-9
x^2-x-13=0