Quadratic formula examples problems

Put in a, b and c: x = [ − (−30) ± √ ( (−30)2 −4×3× (−12)) ] / (2×3) Solve: x = [ 30 ± √ (900+144) ] / 6. x = [ 30 ± √ (1044) ] / 6. x = ( 30 ± 32.31 ) / 6. x = −0.39 or 10.39. Answer: x = −0.39 or 10.39 (to 2 decimal places) x = −0.39 makes no sense for

Quadratic formula

For problems 1 – 7 solve the quadratic equation by factoring. u2 −5u−14 = 0 u 2 − 5 u − 14 = 0 Solution. x2 +15x =−50 x 2 + 15 x = − 50 Solution. y2 = 11y−28 y 2 = 11 y − 28

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Quadratic Formula Practice

The quadratic formula is used to solve quadratic equations. Consider a quadratic equation in standard form: ax2 + bx + c = 0 a x 2 + b x + c = 0 You may also see the standard form called a general quadratic equation, or the general form. So
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