I need help on a question the questions says
by eliminating Y, find the solution to the Simulataneous Eqautions.
X(squared)+Y(squared)=25
Y=X-7
Thanks in Advance,
Aslam
Well you can solve that equation to find x and from there find y:
$\displaystyle 2x^2 - 14x + 24 = 0$
Divide by 2: $\displaystyle x^2 - 7x+12 = 0$
I can see that this factorises to $\displaystyle (x-4)(x-3) = 0$
therefore either x-4=0 or x-3=0 and therefore x = 4 or x=3.
We then put these back into y = x-7
y = 4-7 = -3 or y = 3-7 = -3.
Our solutions are therefore x=4, y=-3 or x=3, y=-4. There are two pairs of answers for this