Solve the following simultaneous equations. x^2 + 2y = 9, y = x + 3
x^2 + 2y = 9y = x + 3
x^2 + 2y = 9x^2 + 2(x+3) = 9x^2 + 2x + 6 = 9x^2 + 2x - 3 = 0(x + 3)(x - 1) = 0x= -3, x = 1
when x = -3y = x + 3y = (-3) + 3y = 0
when x = 1y = x + 3y = (1) + 3y = 4
JF
Related Maths GCSE answers
All answers ▸Solve 5 < x² + 1 < 10
n sweets, 6 are orange, the rest are yellow. Sophie takes at random a sweet. She eats the sweet. Sophie then takes at random another sweet. She eats the sweet. The probability that Sophie eats two orange sweets is 1/3. Show that n² – n – 90 = 0
Expand and simplify 2y+3y(5y+3)
Solve algebraically: 6a + b = 16 ..... 5a - 2b = 19