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Machuco127
19.03.2020 •
Mathematics
Solve the equation for all real solutions.
15r2 – 6r – 3 = -2r
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Ответ:
Step-by-step explanation:
hello :
15r² – 6r – 3 = -2r
15r² – 6r – 3 +2r =0
15r²-4r -3 =0
delta =b² -4ac a=15 b=-4 c=-3
delta =(-4)² - 4(15)(-3)=196 = 14²
r1 = (-b - √delta ) /2a = (4-14)/30 = -10/30 = -2/6 = -1/3
r2 = (-b + √delta ) /2a = (4+14)/30 = 18/30 = 3/5
Ответ:
1/7
Step-by-step explanation:
(1/7)
1 is the square root and 7 plus is the bottom