Answer:
Step-by-step explanation:
9x⁴ – 2x² – 7 = 0
Let's say that u = x²:
9u² – 2u – 7 = 0
Factor:
(u – 1) (9u + 7) = 0
u = 1, -7/9
Since u = x²:
x² = 1, -7/9
x = ±1, ±i √(7/9)
Answer:

Chukliya bhaiya iss chiz khi toh mere ko zarurat thi zindagi mein!!(╥﹏╥)(╥﹏╥)
Answer:8 candy bars because 21-5=16/2=8 candy bars.
Step-by-step explanation:
Answer:
The formula for the perimeter of a rectangle is P = (2*width) + (2*height)
this is basically saying, since opposite sides are equal in a rectangle,
Perimeter = 5 + 5 + 6 + 6, so P = 22ft
Step-by-step explanation:
Answer:
x≥1/2
Step-by-step explanation: