B. Directions: Find the factors of the following quadratic equations in solving for the roots of the given equations. choose only the letter that corresponds to your answer.

Choice:

a. (2x-5) (x+4)

b. (x+1) (x-7)

c. (x-3) (x+5)

d. (x+4) (x-2)

e. x(3x+5)

Answer:

e. 1) 3x²+5x=0

c. 2) x²+2x-15=0

a. 3) 2x²+3x-20=0

b. 4) x²-6x-7=0

d. 5) x²+2x-11=-3

Solution:

a. (2x-5) (x+4)=0

2x²+8x-5x-20=0

3) 2x²+3x-20=0

b. (x+1) (x-7)=0

x²-7x+1x-7=0

4) x²-6x-7=0

c. (x-3) (x+5)=0

x²+5x-3x-15=0

2) x²+2x-15=0

d. (x+4) (x-2)=0

x²-2x+4x-8=0

5) x²+2x-8=0

x²+2x-11=-3

x²+2x-11+3=0

5) x²+2x-8=0

e. x(3x+5)=0

1) 3x²+5=0

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