Question

This is Anya's solution for the equation x ^ 2 - 6x - 7 = 0 Is her solution correct ? Explain your answer in detail points ANSWER AND EXPLANATION:​

Answer 1

She solved through completing square so we will go through another way

• x²-6x-7=0
• x²-7x+x-7=0
• x(x-7)+1(x-7)=0
• (x+1)(x-7)=0
• x=-1 or 7

She's wrong

She did error at 5 the step

• (x-3)²=16
• x-3=±4
• x=7 or -1

Answer 2

x = 7

x = -1

Explanation: