Tkam0673 Tkam0673
  • 11-05-2020
  • Mathematics
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Complete the steps in solving the quadratic function 7x – 9 = 7x2 – 49x by completing the square

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Аноним Аноним
  • 11-05-2020

Answer:

x={-sqrt(103/7)+4, sqrt(103/7) +4}

Step-by-step explanation:

Subtract 7x from both sides: 7x^2-56x=-9

Divide both sides by 7: x^2-8x=-9/7

Solve for a (2ax=-8x): -4

Plug a back in: -9/7+(-4)^2=103/7

Complete the square: (x-4)^2=103/7

Therefore, x={-sqrt(103/7)+4, sqrt(103/7) +4}

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