solve the equation algebraically

label Algebra
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4x^2-12x=7 

May 25th, 2015

4x^2-12x=7

4x^2-12x=7

4x^2-12x-7=0

4*7=2*2*7=2*(2*7)=2*14 and 14-2=12, the coefficient of the middle term

(2x  )(2x  )=0 so far...

(2x  1)(2x 7)=0 so far...

(2x+1)(2x-7)=0

2x+1=0

2x=-1

x=-1/2

2x-7=0

2x=7

x=7/2


May 25th, 2015

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