In my opinion you didn't answer questions a),b) and c), wolphram alpha did, but I think you understand what to do.
Hi I have answered some questions and was hoping to find out if I have answered them correctly.
Questions
a) Plot on graph paper the graph of y=x^2 for values of x between -8 and +8
Use the graph to solve the following equations
b) X^2 = 7x + 2
c) X^2 = 4 – 6x
d) Verify your solutions numerically
Answers
Solution to a), b) and c)
plot x^2 = 7x + 2
http://www.wolframalpha.com/input/?i=plot+%28y%3Dx^2%29%2C+%28x^2%3D7x%2B2%29+-8+to+8
and x^2 = 4-6x against y=x^2
http://www.wolframalpha.com/input/?i=plot+%28y%3Dx^2%29%2C+%28x^2%3D4-6x%29+-8+to+8
d) Use the quadratic formula to solve numerically
x^2 = 7x + 2 becomes: x^2-7x-2=0
x = -0.274197, 7.24792
x^2 = 4-6x becomes: x^2+6x-4=0
x= -6.6055551, 0.60555127
Would simply plotting b) and c) against x^2 be the answer to those questions?
Thanks for any help.