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2 September, 12:01

Solve the quadratic equation by the square root property.

(2x + 5) 2 = 49

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Answers (2)
  1. 2 September, 14:47
    0
    This is all if you don't solve as a quadratic equation.

    Look at the other answer.

    Answer:

    x = 9.75

    Step-by-step explanation:

    Step 1. Distribute the 2 (Do 2 times 2x and 2 tiems 5)

    4x + 10 = 49

    Step 2. Subtract 10 from both sides.

    4x = 39

    Step 3. Divide it all by 4 to isolate the variable.

    x = 9.75
  2. 2 September, 15:19
    0
    x=1 and x=-6

    Step-by-step explanation:

    (2x + 5) ^2 = 49

    Take the square root of each side

    sqrt ((2x + 5) ^2) = ±sqrt (49)

    2x+5 = ±7

    Subtract 5 from each side

    2x+5-5 = 7-5 2x+5-5 = - 7-5

    2x = 2 2x = -12

    Divide by 2

    2x/2 = 2/2 2x/2 = - 12/2

    x = 1 x = - 6
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