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mario62 [17]
3 years ago
8

Y=-3x^2-30x-27 find the zeroes of the function by rewriting the function in intercept form

Mathematics
1 answer:
CaHeK987 [17]3 years ago
3 0
<span>y=-3x²-30x-27

Δ=b²-4ac=(-30)²-4.(-3).(-27)=900-324=576 ∴ √Δ=24

x'=(-b+√Δ)/2a=(-(-30)+24)/2.(-3)=-54/6=-9

x''=</span><span>(-b-√Δ)/2a=(-(-30)-24)/2.(-3)=-6/6=-1

Raízes são x''=-9 e x''=-1
</span>
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