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(x+2)(x-3) expand and simplify

A key algebraic technique for double brackets is FOILx^2 -3x + 2x -6simplify furtherx^2 -x -6can check by factorisingthe integers adds to make "the number" and multiply to make "the x"
GF
Answered by Grace F. • Maths tutor
3847 Views

How can I find the stationary points of a parabola given it's equation?

You can find the stationary points by differentiating the equation and then solving it for zero. What this means, is that you can take the power of the Xs in the equation, and differentiate by bringing the p...
MA
Answered by Miriam A. • Maths tutor
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Solve algebraically the simultaneous equations 2x^2-y^2=17 and x+2y=1

To solve these equations, we have to rearrange the second equation to make x ‘the subject’ and then we can substitute it into the first one. First, subtract 2y from both sides so x=1-2yNext substitute this i...
BH
Answered by Benjamin H. • Maths tutor
15868 Views

Factorise 3xy+6x^2

3xy+6x^2There is a common factor of x in both terms so we can factor x out of the expressionx(3y+6x)There is also a common factor of 3 in both terms so we can factor that out also3x(y+2x)
DS
Answered by Dominic S. • Maths tutor
6807 Views

Solve these simultaneous equations (1) 12x + 3.5y = 32 (2) 8x + 3y = 24

Make the like terms equate by multiplying (1)*2 and (2)*3, ((1)*2) 24x+7y=64, ((2)*3) 24x+9y=72, Take one away from the other to remove the x term and solve for y, (24x+9y=72) - (24x+7y=64), 2y=8 y=4, Substi...
KJ
Answered by Karen J. • Maths tutor
2978 Views