Solve the quadratic equation: 3x^2+x-5=0

Mathematics

1 answer:

adell [148]2 years ago

4 0

3x²+x-5=0

a = 3, b = 1, c= -5

-> ∆ ( delta ) = b²-4ac = 61 > 0

-> x1 =( -b+√∆ )÷ 2a =...

x2 = (-b-√∆)÷2a =...

p/s: do your teachers teach you how to use ∆ ( delta ) in maths calculation ? i live in europe and our teachers teach us that way. however, it is a rịght and fast way. you should learn it.

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Read 2 more answers

Hi,please someone can help me i'm lost..

andreyandreev [35.5K]

Answer:

let the number be n

$\frac{n}{6} +6=2\\\\\frac{n}{6} = -4\\\\n = -24$

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