How do you factor 5x2 plus 7x plus 21?

Anonymous

∙ 13y ago

Updated: 8/18/2019

That doesn't factor neatly. Applying the quadratic equation, we find two imaginary solutions: (-7 plus or minus the square root of -371) divided by 10

x = -0.7 + 1.9261360284258224i
x = -0.7 - 1.9261360284258224i

where i is the square root of negative one.

Wiki User

∙ 13y ago

What else can I help you with?

What is the factor of 5x2 plus 7x?

x(5x + 7)

How do you factor the trinomial 5x2 plus 7x plus 2 with each factor as a polynomial in descending order?

(5x + 2)(x + 1)

When dividing the polynomial x3 plus 5x2 plus 7x plus 3 by x plus 3 the remainder is 0 making x plus 3 a factor?

True.

What is the trinomial 5x squared plus 7x plus 2?

5x2+ 7x + 2 = (x + 1)(5x + 2).

5x squared plus 7x equals 12?

5x2+7x = 12 5x2+7x-12 = 0 (5x+12)(x-1) = 0 x = -12/5 or x = 1

What kind of polynomial is shown 0.2x4 - 5x2 - 7x?

I am assuming this is: .2x4 - 5x2 - 7x, which would be a Quartic Polynomial.

How do you factor 49x2 plus 42xb plus 9b2?

(3b + 7x)(3b + 7x) or (3b + 7x)2

How do you factor 7X plus 7?

7x + 7 = 7(x + 1)

How would you factor 2x squared plus 7x plus 6?

You would factor 2x2 + 7x + 6 into (2x + 3) (x+2)

Do Simplify 5x2 3x - 7 x2 - 7x 4?

7x 2= 14

How do you factor x2 plus 7x plus 6?

x2 + 7x + 6 = (x + 6) (x + 1)

How do you completely factor 21x4-14x3 plus 35x2 plus 7x?

7x(3x3 - 2x2 + 5x + 1)