Top answers

Maths
GCSE

expand (x + 5) (x + 3)

x^2 + 8x + 15

TW
Answered by Thomas W. • Maths tutor
3055 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

TD
Answered by Tutor52832 D. • Maths tutor
3451 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...

MM
Answered by Mikhailia M. • Maths tutor
4306 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...

EH
Answered by Evan H. • Maths tutor
35602 Views

How would one multiply out brackets?

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