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Algebra and Expressions

Quick questions on Solving quadratic equations - Grade 10 Math MCAS

3short 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 (x+2)(x−9)=0(x + 2)(x - 9) = 0.
What is q2?
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How many real roots does x2+x+4=0x^2 + x + 4 = 0 have?
What is sign error in the discriminant?
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With c=−5c = -5, the term −4ac=−4(2)(−5)=+40-4ac = -4(2)(-5) = +40. A negative cc makes −4ac-4ac positive.

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