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Quick questions on Quadratic functions and equations: graphs, roots and the formula - SQA National 5 Maths

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 not setting the equation to zero first?
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The factorising and formula methods need ax2+bx+c=0ax^2 + bx + c = 0; rearrange before solving.
What is q1?
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Solve x2−9=0x^2 - 9 = 0. [2 marks]
What is q2?
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Solve x2+5x+6=0x^2 + 5x + 6 = 0. [2 marks]
What is q3?
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Solve x2+6x+2=0x^2 + 6x + 2 = 0 to 1 decimal place. [3 marks]

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