Ask Question
19 July, 15:19

Solve x2+10x+21=0 ... ?

+3
Answers (1)
  1. 19 July, 18:15
    0
    X²+10x+21=0

    / / = 10²-4*1*21

    / / = 100 - 84

    / / = 16

    x = (-10+/-//16) / 2

    x = (-10+/-4) / 2

    x' = (-10+4) / 2 = - 6/2 = - 3

    x" = (-10-4) / 2 = - 14/2 = - 7

    S: {-3; - 7}
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Solve x2+10x+21=0 ... ? ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers