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10 questions from this quiz
ax2+bx+c=0ax^2 + bx + c = 0ax2+bx+c=0 where a≠0a \neq 0a=0
x2+5x+6=0x^2 + 5x + 6 = 0x2+5x+6=0
If ab=0ab = 0ab=0 then a=0a = 0a=0 or b=0b = 0b=0
Multiply to ccc and add to bbb
a×ca \times ca×c
Square of half the xxx-coefficient
Divide all terms by aaa
x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2a−b±b2−4ac
When factorisation is difficult
Forgetting the negative sign before bbb
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