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Expand and simplify: (x+7)(x+3)

This is a question that requires multiple steps, and in the exam may be worth around 3 marks. One will be for expanding, one for simplifying, and one mark for working.First step: expand the brackets. This co...
LS
Answered by Lily S. • Maths tutor
11925 Views

If x=3 and y=7, which of the following gives value of 23?

1.) y 2 /x2.) x 2 +2y3.) xy4.) y 2 -2x 2
MM
Answered by Megan M. • Maths tutor
2355 Views

Factorise the expression: 8x + 32

8x + 32 Highest common factor of 8 and 32 is 8 8/8 = 132/8 = 4 8x + 32 - divide through by 8 8(x + 4) We can check this by multiplying out: 8(x + 4) 8 * x = 8x 8 * 4 = 32Hence8(x+4) when multiplied out = 8x ...
RC
Answered by Rob C. • Maths tutor
5423 Views

Prove that the square of an odd number is always 1 more than a multiple of 4

(2n+1) 2 = (2n+1)(2n+1) Use FOIL method= 4n 2 +2n+2n+1= 4n 2 +4n+1= 4(4n+n)+1 4n+n is just a number, therefore proved
DH
Answered by Daniel H. • Maths tutor
2795 Views

How to solve a quadratic by factorisation?

There are 4 different methods to solve quadratics: factorisation, quadratic formula, graphically and completing the square. Today we shall solve equations by factorisation.Using the equation x 2 + 6x + 8,1) ...
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Answered by Oyin O. • Maths tutor
3011 Views