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1)Solve by factoring:5x^2=4-19x

2)Which quadratic equation has roots 7 and -2/3?

3)To solve 4x^2-28x+49=25 by using the square root property,you would first rewrite the equation as

4)Find the value of c that makes x^2+5x+c a perfect square trinomial.

5)The quadratic equation x^2-8x=-20 is to be solved by completing the square.Which equation would be a step in that solution?

#1, ok
#2, I got B roots are 7 and -2/3, so the equation would be (x-7)(3x+2)=0
expand it, and you will get B
#3, ok
#4, ok
#5 ol

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