Home Forums Math What is the discriminant of 9x^2 + 2 = 10x?

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ProtonsTalk
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What is the discriminant of 9x2 + 2 = 10x?

• This topic was modified 2 years, 1 month ago by ProtonsTalk.
• This topic was modified 2 years, 1 month ago by ProtonsTalk.
• This topic was modified 2 years, 1 month ago by ProtonsTalk.
• This topic was modified 1 year, 8 months ago by ProtonsTalk.
#20782
ProtonsTalk
Keymaster
10

Discriminant of 9x2 + 2 = 10x is 28

Solution:

Discriminant of a quadratic equation ax2 + bx + c is

=> b2 – 4ac

Given equation is 9x2 + 2 = 10x

Moving 10x to the left we get

=> 9x2 – 10x + 2 = 0

Comparing with general form of equation

=> a = 9, b = -10, c=2;

Substituting into the discriminant formula, we get

=> (-10)2 – 4(9)(2)

=> 100 – 72

=> 28

So, the discriminant of 9x2 + 2 = 10x is 28

• This reply was modified 1 year, 8 months ago by ProtonsTalk.
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