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2x^2 +bx−10=0, if one of its roots is 5 find x and b
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2x^2 +bx−10=0, if one of its roots is 5

find x and b

User Sashko Lykhenko
by
5.1k points

2 Answers

5 votes

Answer:

b=-8

Explanation:

User Zanseb
by
5.9k points
3 votes

Explanation:

if one of the roots is 5 then replace x with 5

2×5^2 + 5b - 10 = 0

50 + 5b -10 = 0

40 + 5b = 0

5b = -40

b = -8

User Terra Kestrel
by
5.7k points
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