Solve the Simultaneous equations x^2 + y^2 =29, y-x=3.
y=x+3, Substitute into equation 1 : (x^2) + (x+3)^2 = 29Expand the Brackets : (x^2) + (x^2 + 6x + 9) = 29Collect like terms : 2x^2 + 6x - 20 = 0Take out a factor of two : x^2 +3x -10 = 0Factorise : (x-2)(x+5) = 0Solve for x: x=2 or x=-5when x=2: Y=8,when x=-5: Y=-5Check Values confirm: They DO ! ! WOop!
TM
Related Maths GCSE answers
All answers ▸The diagram shows a sector ORST of a circle with centre O. OR = OT = 10.4 cm. Angle ROT = 120°. (a) Calculate the length of the arc RST of the sector (3s.f)
3x+18=14x+2
The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. what is the radius of the circle?
Factorise x^2 +6x + 8