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Maths
GCSE

expand (x + 5) (x + 3)

x^2 + 8x + 15

Answered by Thomas W. • Maths tutor
2666 Views

How do you use the quadratic formula?

Every quadratic equation is in the form: ax2 + bx + c The quadratic formula is as follows: [ -b ± sqrt(b2

Answered by Tutor52832 D. • Maths tutor
3016 Views

How do you complete the square to answer quadratic equations?

x2+6x-2 = 0

We use completing the square when the equation cannot be factorised. Begin by placing x2  in the brackets and halving the number in front of the x...

Answered by Mikhailia M. • Maths tutor
3933 Views

y is inversely proportion to the square of x. y=10 when x=5. Express y in terms of x.

y is proportion to 1/x2. This can be written as y=k/x2 where k is a constant of proportionality. Given that y=10 when x=5, k can...

Answered by Evan H. • Maths tutor
32937 Views

How would one multiply out brackets?

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