Question

Find the zeros of the quadratic expression x^2+2x-13

Answer 1

Step-by-step explanation:

x2-2x-13=0

Two solutions were found :

x =(2-√56)/2=1-√ 14 = -2.742

x =(2+√56)/2=1+√ 14 = 4.742

Step by step solution :

Step 1 :

Trying to factor by splitting the middle term

1.1 Factoring x2-2x-13

The first term is, x2 its coefficient is 1 .

The middle term is, -2x its coefficient is -2 .

The last term, "the constant", is -13

Step-1 : Multiply the coefficient of the first term by the constant 1 • -13 = -13

Step-2 : Find two factors of -13 whose sum equals the coefficient of the middle term, which is -2 .

-13 + 1 = -12

-1 + 13 = 12

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

Answer 2

Answer:

-2.742 or 4.742 are the two zeroes

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Step-by-step explanation: