Find the solution of equation 2x^2-mx-25n=0;if m+5=0 and n-1=0
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here is youe answer
m+5=0
m=-5
n-1=0
n=1
2x^2-mx-25n=0
2x^2+5x-25×1=0
2x^2+5x-25=0
2x^2+10x-5x-25=0
2x(x+5)-5(x+5)=0
(x+5)(2x-5)=0
x+5=0 or 2x-5=0
x=-5 or 2x=5
x=-5 or x=5/2=2.5
m+5=0
m=-5
n-1=0
n=1
2x^2-mx-25n=0
2x^2+5x-25×1=0
2x^2+5x-25=0
2x^2+10x-5x-25=0
2x(x+5)-5(x+5)=0
(x+5)(2x-5)=0
x+5=0 or 2x-5=0
x=-5 or 2x=5
x=-5 or x=5/2=2.5
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