Page 13 - Algebra 1
P. 13
8. Add 2 on both side x4 + 1 +2=119+2
𝑥4
Using the identity x2 + 1 = (x + 1 )2 – 2
(x2 + 1 )2= 121 𝑥2
x2+1 =11 𝑥2
Subtract 2 from both sides
21
x+ –2=11–2
12 (x– )=9
1
x– =3
𝑥
𝑥2 𝑥
𝑥2
𝑥
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ALGEBRA
