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Express 2x^2 +8x +7 in the form A(x+B)^2 + C, where A, B and C are constants

2x²+8x+7=2(x²+4)+7=2((x+2)²-4)+7=2(x+2)²-8+7=2(x+2)²-1A=2, B=2, C=-1

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Express 2x^2 +8x +7 in the form A(x+B)^2 + C, where A, B and C are constants

Related Maths A Level answers

Find all the solutions of 2 cos 2x = 1 – 2 sinx in the interval 0 ≤ x ≤ 360°.

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Find the indefinite integral of 3x - x^(3/2) dx

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Express 2x^2 +8x +7 in the form A(x+B)^2 + C, where A, B and C are constants

Related Maths A Level answers

Find all the solutions of 2 cos 2x = 1 – 2 sinx in the interval 0 ≤ x ≤ 360°.

What is the derivative of x^x

By forming and solving a quadratic equation, solve the equation 5*cosec(x) + cosec^2(x) = 2 - cot^2(x) in the interval 0<x<2*pi, giving the values of x in radians to three significant figures.

Find the indefinite integral of 3x - x^(3/2) dx

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ABCya

© 2026 by IXL Learning

By forming and solving a quadratic equation, solve the equation 5cosec(x) + cosec^2(x) = 2 - cot^2(x) in the interval 0<x<2pi, giving the values of x in radians to three significant figures.