if a polynomial x^2 + ax - c cuts the x - axis at 2 and -4, then find a and c
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Answer:
2x+ax-c is satisfied by x-axis at 2 and -4 then this polynomial is equal to 0.
Step-by-step explanation:
when x=2, 2×2+2×a-c=0
- 2a-c=-4
when x=-4, 2×-4×a-c=0
2. 4a-c=-8
when we equal these equation then c = 0
a = -2
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