Question

mx(x-7)+49=0,has equal roots.find valur of m by quadratic equations

Answer 1

mx(x-7)+49=0

mx²-7mx+49=0

For equal roots

b²-4ac=0

∴(-7m)-4*m*49=0

49m²-196m=o

m²=196m\49

m²=4m

m=4

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