Question

Help? :(

Answer 1

A quadratic equation is shown below:
9x^2 - 16x + 60 = 0

Part A: Describe the solution(s) to the equation by just determining the discriminant. Show your work.

Answer:The discriminant is b^2-4ac, so that would be (16^2)-4(9)(60), which equals -1,904. This would have two complex roots because it is less than 0.

Part B: Solve 4x2 + 8x - 5 = 0 by using an appropriate method. Show the steps of your work, and explain why you chose the method used.

Answer: 4x^2 + 8x - 5 = 0 by grouping:
Multiply leading and trailing coefficients to get 4*-5 = -20
Find pair of factors of -20 that sum to 8: -2*10 = -20, -2+10 = 8
Rewrite it, splitting middle term with two factors:
4x^2−2x+10x−5 Now group into two groups (4x^2−2x)+(10x−5)

Part C: Solve 2x2 -12x + 5 = 0 by using a method different from the one you used in Part B. Show the steps of your work.

Can someone help me with Part C? :/

Answer 2

I only need help with Part C

Answer 3

@phi Can you help? :/