Question 1116344
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solve 2x^2 +13x+ 20 = 0 using complete the square
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The correct solution is THIS:


<pre>
2x^2 +13x+ 20 = 0

x^2 + 6.5x + 10 = 0

x^2 + 6.5x + (6.5/2)^2 = -10 + (6.5/2)^2 = 0.5625

(x + 3.25)^2 = 0.75^2

x + 3.25 = +/- 0.75

x = -3.25 +/- 0.75


There are TWO solutions:  x= -3.25 + 0.75 = -2.5,   and   x= -3.25 - 0.75 = -4.


<U>Check</U>.  2*(-2.5)^2 +13*(-2.5) + 20 = 0   ! Correct !

        2*(-4)^2 +13*(-4) + 20 = 0       ! Correct ! 
</pre>

Solved.