algebra

Solve the equation using the zero-product property.
-9n(5n-5)
a. -1/9, 1
b. 0,1*****
c. -1/9,-1
d. 0,-1

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth.
x^2-6=x
a. x=2,3
b. x=-2,3 *****
c. x=2,-3
d. x=-2,-3

How many real number solutions does the equation have?
y=-5x^2+8x-7

a. one
b. two
c. none*****
d. infinitely many

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  1. 1. your answer is correct if you actually had an equation.
    Should have said:
    -9n(5n-5) = 0

    2. correct

    3. y = y=-5x^2+8x-7 is a parabola, on which lie an infinite number of points.
    If you wanted the solution to -5x^2+8x-7 = 0
    you are right, there is no solution.

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  2. hey first jiskha user

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