# math

posted by .

Select the approximate values of x that are solutions to f(x) = 0, where
f(x) = -2x^2 + 5x + 7.

a) {3.50, –1.00}

b) {-2, 5}

c) {–2.50, –3.50}

d) {–0.29, 0.71}

• math -

The roots p,q, of the equation
ax²+bx+c=0
have the properties that:
p*q = c/a
p+q =-b/a
Check each of the solution sets above,
c/a=-3.5
If p*q ≠ -3.5, then p and q are not solutions to the equation.
If p*q = -3.5, then check if p+q = -b/a=2.5.
If both conditions are satisfied, p and q form the solution set to the equation.

## Similar Questions

1. Which of the following conclusions is true about the statement below ?

1. Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 8 units. A. g (x)= (x +13)^2 B. g (x)= ( x+8 )^2 +5 C. g (x)= x^2 -3 D. g (x)= x^2+13 I think (D.) is my answer please check over for me. …
3. ### math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -6x^2 + 4x + 7.
4. ### math

select the approximate values of x that are solutions to f(x)=0, f(x)=-8x^2+2x+4
5. ### math

select the approximate values of x that are solutions to f(x)=0 where f(x)-5x^2+8+5
6. ### Math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x^2 + 9x + 3.
7. ### math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -6x2 + 3x + 3.
8. ### math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 9x + 5. (a){–1.80, 1.80} (b){-9, 9} (c){–1.00, –0.56} (d){–0.40, 1.40}
9. ### math

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x2 + 6x + 3.
10. ### MATH 117A

Select the approximate values of x that are solutions to f(x)=0,where f(x)=-9x^2+7x+2 A.{-0.22,1.00} B.{-9,7} C.{-0.78,-0.22} D.{-4.50,3,50}

More Similar Questions