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OpenStudy (anonymous):
Solve the quadratic equation 5x2 - 125 = 0. A. -5 B. 5 C. ±5 D. ±25
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OpenStudy (stamp):
hint: factor your expression
OpenStudy (ryan123345):
C because when you plug in the numbers it equals 0 :)
OpenStudy (stamp):
lol but what if the multiple choice wasn't there...
OpenStudy (stamp):
is it game over? because guess and check isnt a good way to "learn" math
OpenStudy (ryan123345):
you arent funny
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OpenStudy (stamp):
sounds like a headache, why not just factor it and set terms equal to zero
OpenStudy (e.cociuba):
Wouldn't there be 2 answers here 5 and -5?
OpenStudy (stamp):
\[5x^2-125=0\]\[5(x^2-25)=0\]\[5(x+5)(x-5)=0\] Identify and solve (x + 5) = 0 (x - 5) = 0 x = +/- 5 ps you are not funny either
OpenStudy (e.cociuba):
Its C.)
OpenStudy (stamp):
@e.cociuba The answer choice includes a +/- sign, so +/- 5 = +5, -5
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OpenStudy (e.cociuba):
Opps srry lol I didn't see tht.
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