n^2 = 49
well, 7^2 = 49
also (-7)^2 = (-7)(-7) = 49
well, 9^2 = (-9)^2 = 81
so, that means you need
81+z = 103
so, what do you think?
What is the solution of n² - 49 = 0
-7
7
±7
No Solution
What is the value of z so that -9 and 9 are both solutions of x² + z = 103
-22
3
22
184
2 answers
good choice.
9 answers