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Algebra

Quick questions on Quadratic equations - ACT Mathematics

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is q1?
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Solve x2−9=0x^{2} - 9 = 0. [1 point]
What is q2?
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Solve x2−7x+12=0x^{2} - 7x + 12 = 0 by factoring. [1 point]
What is sign error in −4ac-4ac?
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With cc negative, −4ac-4ac becomes positive, which increases the discriminant. Track the sign carefully.
What is not setting the equation to zero?
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Move all terms to one side before factoring or using the formula; the methods need =0= 0.

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