Solve the following simultaneous equations: x^2 + y^2 = 5, y - 3x = 1.

Begin by rearranging equation 2 so that it is in the form y = ...
Substitute this into equation 1
Expand the brackets and simplify the equation so that it is in the form Ax^2 + Bx + C = 0
Factorise this quadratic equation to find the two possible solutions for x
Find the respective y values for each value of x
y = 3x +1x^2 + (3x + 1)^2 = 510x^2 + 6x -4 = 0(10x - 4)(x + 1) = 0x = 0.4 or x = -1y = 2.2 or y = -2

DO

Related Maths GCSE answers

All answers ▸

Work out the equation of the tangent to a circle of centre [0,0] at the point [4,3]


Factorise x^2+6x+8


Given that y = 5, solve the following equation for x, 9x - 3y = 97 - 5x


How do you find a missing side length in a right-angled triangle?