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2(m+25)=4(m-0.5)m=
We move all terms to the left:
2(m+25)-(4(m-0.5)m)=0
We multiply parentheses
2m-(4(m-0.5)m)+50=0
We calculate terms in parentheses: -(4(m-0.5)m), so:We get rid of parentheses
4(m-0.5)m
We multiply parentheses
4m^2-2m
Back to the equation:
-(4m^2-2m)
-4m^2+2m+2m+50=0
We add all the numbers together, and all the variables
-4m^2+4m+50=0
a = -4; b = 4; c = +50;
Δ = b2-4ac
Δ = 42-4·(-4)·50
Δ = 816
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{816}=\sqrt{16*51}=\sqrt{16}*\sqrt{51}=4\sqrt{51}$$m_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-4\sqrt{51}}{2*-4}=\frac{-4-4\sqrt{51}}{-8} $$m_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+4\sqrt{51}}{2*-4}=\frac{-4+4\sqrt{51}}{-8} $
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