x²+y²=13
2x+y=1
I then tried to solve by substitution:
y=1-2x
x²+(1-2x)²=13
I then got a bit muddled up and wasn't sure how to expand (1-2x)²
But the answer i got would not factorise into two brackets so i decided to use the quadratic formula:
-b+/- sqrt ......
but this did not get the correct answer of:
x=-1.2, y=3.4
x=2, y=-3
Please help me because i don't have a clue what to do next!
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x²+y²=13
2x+y=1
I then tried to solve by substitution:
y=1-2x
x²+(1-2x)²=13
I then got a bit muddled up and wasn't sure how to expand (1-2x)²
But the answer i got would not factorise into two brackets so i decided to use the quadratic formula:
-b+/- sqrt ......
but this did not get the correct answer of:
x=-1.2, y=3.4
x=2, y=-3
Please help me because i don't have a clue what to do next!