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1.5.6 Polynomials and rational expressions

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Question 36

Prove that $x^2 + 4x > 2x - 4$ for all real values of $x$ .

[3]

A student claims: "If I add 2 to a number and then square the sum, the result is always greater than the square of the original number." State, giving a reason, whether this claim is always true, sometimes true or never true.

[2]

Markscheme

1.5.6 Polynomials and rational expressions Questions

A Level
Maths
1.5.6 Polynomials and rational expressions

113 exam-style questions on AQA A Level Maths 1.5.6 Polynomials and rational expressions. Each one has a worked solution and a mark scheme showing where the marks go.

1.5.6 Polynomials and rational expressions

Question bank

1.5.6 Polynomials and rational expressions

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Question 36

Prove that $x^2 + 4x > 2x - 4$ for all real values of $x$ .

[3]

[2]

Markscheme

1.5.6 Polynomials and rational expressions Questions

A Level
Maths
1.5.6 Polynomials and rational expressions

113 exam-style questions on AQA A Level Maths 1.5.6 Polynomials and rational expressions. Each one has a worked solution and a mark scheme showing where the marks go.