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Algebra

Quick questions on Quadratic equations and graphs - WJEC GCSE Maths (Algebra, Higher)

2short 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 sign errors in the formula?
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With b=5b = -5, the b-b is +5+5; substitute negative coefficients carefully using brackets.
What is not setting the equation to zero first?
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Rearrange to ax2+bx+c=0ax^2 + bx + c = 0 before factorising or using the formula.

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