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Solve 4a2 + 25 = –20a by factoring. Verify your solution

Solve and verify the following equation:
13x2 + 35x + 21 = –12x2 – 25x – 15

  • math -

    4a^2 + 25 = –20a
    4a^2 + 20a + 25 = 0
    (2a +5)^2 = 0
    a = -5/2

    13x^2 + 35x + 21 = –12x^2 – 25x – 15
    25x^2 + 60x +36 = 0
    (5a +6)^2 = 0
    a = -6/5

    You do the verifying.

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