Which method should be used to solve the system? Explain your answer, including a description of the first step.10x2 + 8y2 =99x2 - 9y2 =81

Question

What will be an ideal response?

Answer 1

Elimination should be used since the equations have the same types of terms (x2, y2, constant), while substitution would require fractions or extra steps. The first step is to multiply the first equation by 9, -9, -9, or 9 or to multiply the second equation by 10, -10, 8, or -8.