IDNStudy.com, ang perpektong platform para sa eksaktong at maaasahang mga sagot. Hanapin ang mga solusyong kailangan mo nang mabilis at tiyak sa tulong ng aming mga bihasang miyembro.

one of the roots of 2x²+x -3 = 0 is 1. what is the other root?
a. 3/2
b.2/3
c.-2/3
d.-3/2​


Sagot :

The answer is letter D. -3/2

SOLUTION: solved by Factoring

2x² + x - 3 = 0

Write x as a difference

→ 2x² + 3x - 2x - 3 = 0

Factor out x from the expression in 2x² + 3x - 2x - 3 = 0

→ x(2x + 3) - 2x - 3 = 0

Factor out the negative sign from the expression in 2x² + 3x - 2x - 3 = 0

→ x(2x + 3) - (2x + 3) = 0

Factor out 2x + 3 from the expression

→ (2x + 3) (x - 1) = 0

Split up into two possible cases

→ 2x + 3 = 0

x - 1 = 0

Solve the equation for x

→ 2x = -3

x = 1

→ x = - 3/2

x = 1

→ x = - 3/2 ; x = 1