How do you factor x2+3x−10?

3 Answers
Vinícius Ferraz
Jul 23, 2015

(x+5)(x−2)

Explanation:

S=−3,P=−10

Two numbers whose product is 10: (1, 10) or (2, 5).

The sign of Sum goes to that which the greater modulus.

The sign of Product (-) shows reverse signs.

x=−10orx=+1⇒S=−9

x=−5orx=+2

Nghi N.
Jul 23, 2015

Factory=x2+3x−10

y = (x - 2)(x + 5)

Explanation:

Y = x^2 + 3x - 10.
Find 2 numbers knowing sum (3) and product (-10).
Factor pairs of (-10) -> (-1, 10)(-2, 5). This sum is 3 = b. The 2 numbers are: -2 and 5.
y = (x - 2)(x + 5).

Sudip Sinha
Jul 23, 2015

(x+5)(x−2)

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