3,-2 would be the answer find the roots first <span><span> </span><span><span><span><span> y(x)=x^2-6x+7</span></span></span></span>s<span><span> <span>
Find roots
complete the square by taking half of the , square it,
then add it to both sides
and so on..
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Answer:
Below in BOLD.
Step-by-step explanation:
1. The discriminant D = b^2 - 4ac
= 3^2 - 4*5*(-7)
= 9 + 140
= 149.
Positive value so it has 2 real solutions.
2. D = (-12)^2 - 4 * 9 * 4
= 144 - 144
= 0.
So it has one real solution.
3. D = 2^2 - 4*1*3
= -8.
It is negative so there are No real solutions.
4. D = 4^2 - 4*2*10 = 16 - 80 = -64.
No solutions.
5. D = (-12)^2 - 4*3*(12)
= 144 - 144 = 0
So its the second choice.
Answer:
the answer is A. $7.10
Step-by-step explanation: