I need help with these Algebra 1 Questions?

Hi! I need help with these Algebra 1 Questions. Please help me if you can. It will truly be appreciated! Thank you in advance! Here are the questions that I am having a hard time with and that I need answers to as soon as possible:

6. Solve the equation x^2 = 49 by finding square roots.

13. Use the quadratic formula to solve the equation:
0 = x^2 + x - 20

15. Find the x-intercepts of the graph of the equation:
y = x^2 - 3x + 2

16. Find the x-intercepts of the graph of the equation:
y = x^2 - 1

17. Decide how many solutions this equation has:
x^2 - 2x + 1 = 0

Anonymous2011-08-04T00:10:31Z

Favorite Answer

6. Solve the equation x^2 = 49 by finding square roots.

why don't you do what they're saying?
x1 = 7
x2 = -7

too hard?

13. Use the quadratic formula to solve the equation:
0 = x^2 + x - 20

ok. Use the quadratic formula.
Find the coefficients
a = 1
b = 1
c = -20

substitute the values and work out the arithmetics
x1 = 4
x2 = -5

see this online calculator to verify your answers
http://matrixlab-examples.com/quadratic-equation-solver.html

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