Y^4 equals 16 if y is 2.

true

false

Hello:

false because : Y^4 = 16 ... Y^4 - 16 = 0

(y²) ²-4² = 0 ... (1)

bu identity : a²-b² = (a+b) (a-b

(1) equi : (y²-4) (y²+4) = 0

but : y²-4 = y²-2² = (y+2) (y-2) = 0

y+2=0 or y-2=0

y=2 or y = - 2

y²+4 = 0 ... y²=-4 no solution in R

conclusion 2 solutions : - 2 and 2

True.

2^2 is 2x2x2x2

2x2 = 4

4x2 = 8

8x2 = 16