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Answered

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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:​

This Is Anyas Solution For The Equation X 2 6x 7 0 Is Her Solution Correct Explain Your Answer In Detail Points ANSWER AND EXPLANATION class=

Sagot :

av12320

Answer:

x = 7

x = -1

Step-by-step explanation:

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
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