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The trick with this question is noticing the hidden quadratic as quartic equations are unsolvable at A-level.
Letting u=x^2 the question becomes u^2+2u-3=0 which most students would be able to solv...
Example.
" Solve the simultaneous equations
y + 4x + 1 = 0
y^2 + 5x^2 + 2x = 0 "
We can rearrange the first equation to something that we can substitute into the seco...
To find the integral of a function you must first incease the power of x by one then divide to coefficient by the new power. So, by increasing the powers first you get 3x^2 - x^(5/2) and then dividing by ...
9x^2 + 8x + 5y +5xdy/dx + 7dy/dx = 0
9x^2 + 8x + 5y = dy/dx(-5x - 7)
dy/dx = - (9x^2 + 8x +5y)/(5x + 7)
Differentiating is a process to turn one expression into another, which has many uses in maths. Our expression is made up of three parts: 8x4, 2x2 and 10. Answered by Jamie C. • Maths tutor3494 Views
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