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This is a typical exam question which some students may find confusing.The trick to this question is realising that you have to rationalise the denominator. (Topic: Surds)4/(2-√2) = 4/(2-√2) x (2+√2)/(2+√...
the aim of finsing the inverse is making x the subject. To start we need to multiply both sides by: (2x+3), giving us:
y(2x+3) = 5x-4
now we need to expand the brackets:
Even though this question seems trivial to most people with some mathematical expertise, it actually cuts quite deep into an intuitive understanding of what multiplication truly is. When one writes an exp...
120
2 x 60
2 x 30
2 x 15
ELAnswered by Edward L. • Maths tutor52156 Views
3x+6=(x+2)(x-4)
3x+6 = x2-2x-8
x2-5x-14=0
(x-7)(x+2)=0
x=7 so y=27
and x=-2 so y=0
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