Homework HELP!! Math!?

Question

5y(2y-10)=25?

Answer 1

5y(2y-10)=25(divide a common value)

y(2y-10)=5(distribute)

2y^2-10y=5(make a zero)

2y^2-10y-5=0(use quadratic formula, which is (-b+/-root(b^2-4ac))/2a)

x=.85,5.85

Answer 2

y: 5.46

Your welcome.

Answer 3

Distribute 5y into the parenthesis.

10y^2- 50y=25

Make a quadratic equation..

10y^2- 50y- 25.

a=10, b= -50, c= -25

Use the quadratic formula to solve.

x= -b +- (plus or minus) the square root (b^2- 4ac)/ (all over) 2a

50 +- Square root of 3500

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20

5 +- Square root 3500

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2

I'd solve the rest but I don't have a calculator with me!  Sorry

Remember to check your answers!

The answers above me look right.  5.46 will work, but the other answer (-.4580 approximately) will not.  It ends up with 6.678= 25.  The other one gives you loosely 25, so it is correct.  It doesn't have to make exactly 25 because it was rounded.

Answer 4

5y(2y-10)=25

y=5.46