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Quadratic Equations, Revision Notes

Quadratic Equations

Quadratic equations are equations of the form a + bx + c = 0.

To solve a quadratic equation we must firstly make sure our equation equals zero. For

instance if + 8x + 8 = -7 we must bring -7 to the other side of our equation so as it

equals 0 i.e. + 8x + 15 = 0

Once our equation equals 0 it can be solved by factorisation. We let both of our factorised

terms equal 0 and solve for x

+ x - 42 = 0 3 + 19x + 26 = 0

(x - 6)(x + 7) = 0 ...

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