21) Solve x2 – 13x – 30 = 0 by factoring.

Question

21) Solve x2 – 13x – 30 = 0 by factoring.

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Thu Cúc 3 years 2021-09-05T09:27:39+00:00 2 Answers 2 views 0

Answers ( )

  1. huyenthanh
    0
    2021-09-05T09:29:01+00:00
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    Answer:

    x=15 or x=-2

    Step-by-step explanation:

    x^2-13x-30=0

    First find the multiples of 30 that will also equal to 13.

    6*5=30 ,15*2=30 and 10*3=30

    1. x^2-15x+2x-30=0
    2. x(x-15)+2(x-15)=0
    3. (x-15)(x-2)=0
    4. x-15=0 or x+2=0
    5. x=15 or x=-2
  2. dangkhoa
    0
    2021-09-05T09:29:26+00:00
    Reply

    Answer:

    x= 15, -2!!!!!!!!!!!!!!

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )