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Factorise 2x^3=10x+12x^2

Move everything to the same side: 2x^3-12X^2-10x=0 2.Take out a factor of 2x: 2x(x^2-6x-5)=0 3.Complete the square on the quadratic: 2x[(x-3)^2-14]=0

Answered by Faye H. • Maths tutor

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Solve x^2+x-30=0

Simultaneous questions: 2x+y=7, 3x-y=8

a) You area told that y is proportional to x2 and that when y = 75, x = 5. Find a formula for y in terms of x. y = x b) Find the value of y when x = 3. c) Find the value of x when y = 1200.

Factorise: 3x^2 - 9x - 30

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