Answer:
Either x= 1 or x= -3/2
Step-by-step explanation:
= 2X^2 + x - 1 =2
= 2x^2 + x -1 - 2 = 0
= 2x^2 + x -3 = 0
now the above equation has become quadratic equation so we apply the quadratic formula which is:
x= (−b ±
√
b^
2 − 4ac
)/2a
here,
a=2, b=1 and c=-3
putting the values in the formula:
x= (−1 ±
√
(1)^
2 − 4(2)(-3)
)/2(2)
x= (−1 ±
√
(1) + 24)
)/(4)
x= (−1 ±
√
25
)/(4)
x= (−1 ± 5 ) / (4)
now,
Either: x= (−1 + 5 ) / (4) or: x= (−1 - 5 ) / (4)
x= (4) /(4) x= (-6) / (4)
x= 1 x= -3/2
