1.

\( 3 x^{2}+10 x-25=0 \)

Answer»

Once in standard form, identify a, b and c from the original equation and plug them into the quadratic formula.

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

3x2 + 10x - 25 = 0

a = 3

b = 10

c = -25

\(x = {-10 \pm \sqrt{10^2-4\times3(-25)} \over 2\times3}\)

\(x = \frac{-10\pm20}{6}\)

\(x = \frac{-10+20}{6}; \frac{-10-20}{6}\)

\(x = \frac{5}{3}, -5\)



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