James Chen TMUA Paper 2 · Question 10

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James Chen TMUA Paper 2 · Q10

Paper 2Algebra

A student mistakenly believes that $(x+y)^2=x^2+y^2$ . The student attempts to evaluate $P^2$ , where $P=a+b$ . The difference between the correct answer and their answer is $Q$ . Which of these quadratics has roots $a$ and $b$ ?

2x^2-2Px+Q

x^2-Px+Q

2x^2+Px+Q

x^2+Px+Q

2x^2-Px+2Q

x^2-2Px-Q

2x^2-Px-Q

x^2-2Px+2Q

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