Question 619525: 3x² + 5x = 0
Answer by mathsmiles(68)   (Show Source):
You can put this solution on YOUR website! 3x^2 + 5x = 0
First, let's simplify by dividing both sides by x
(3x^2 + 5x)/x = 0/x We can then factor an x from each ...
3x^2/x + 5x/x = 0/x Simplifying ...
3x + 5 = 0 Subtract 5 from each side
3x = -5 Divide both sides by 3
x = -5/3
Checking:
3x^2 + 5x = 0
3(-5/3)^2 + 5(-5/3) = 0
3 (25/9) + -25/3 = 0
75/9 + -25/3 = 0
Factoring 3/3 from the first ...
25/3(3/3) + -25/3 = 0
25/3 - 25/3 = 0
0=0 Check!
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