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Mathematics 21 Online
OpenStudy (anonymous):

Solve 5x2 + 25x = 180. Choose one answer. a. x = 4 and x = -9 b. x = 4 and x = 9 c. x = -4 and x = -9 d. x = -4 and x = 9 Solve x2 - 4x = 5. Choose one answer. a. x = 1 and x = -5 b. x = 1 and x = 5 c. x = -1 and x = 5 d. x = -1 and x = -5

OpenStudy (asnaseer):

for the first one, notice it can be divided by 5 to simplify it first

OpenStudy (asnaseer):

can you do that step?

OpenStudy (tommo_lcfc):

The first answer is (a). The second answer is (c).

OpenStudy (anonymous):

a. x = 4 and x = -9 c. x = -1 and x = 5

OpenStudy (asnaseer):

joemost: do you understand how to solve these?

Parth (parthkohli):

This is a quadratic equation

OpenStudy (anonymous):

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