damianfrasieanu5387
22.01.2022 •
Mathematics
If x = -2 what is the value of 2x + 3x
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Ответ:
-10
Step-by-step explanation:
2(-2) = -4
3(-2) = -6
-4 + -6 = -10
Ответ:
solutions at -1 and 11
Step-by-step explanation:
(-b ± √b²-4ac) / 2a
in this problem, a = 1, b = -10, c = -11
(10±√100-4(-1)(-11)) / 2(1) =
(10 + √144) / 2 = 22/2 = 11
(10 - √144) / 2 = -2 / 2 = -1