which of the following is a quadratic equation?
a. 2r²+4r-1=0
b. 31-7=2
c. s²+5s-4
d. 2x²-7x≥3
a. 2r²+4r-1=0
b. 31-7=2
c. s²+5s-4
d. 2x²-7x≥3
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Answer:
A.
Step-by-step explanation:
because the roots of quadratic equation is ax²+bx+c=0
Answer:
Letter A.
Explanation:
when it comes to quadratic equation the highest degree is 2 and it should be in ax²+bx+c=0