Question

9 whole to the power x + 2 minus 240 is equal to 9 to the power x

Answer 1

Heya!

9^x+2 - 240 = 9^x

=)9^x+2 - 9^x =240

=) 9^x ( 9^2 - 9^0 ) = 240

=) 9^x ( 81 - 1 ) =240

=) 9^x * 80 =240

=) 9^x = 240/80

=)9^x = 3

=) 3^2x =3^1

=) 2x = 1

=) x = 1/2

Hope it helps u.

Answer 2

Answer:

0.5

Step-by-step explanation:

9^(x + 2) - 240 = 9^x

9^x.9² = 240 + 9^x

81.9^x = 240 + 9^x

81.9^x-9^x=240

9^x(81 - 1) = 240

9^x .80 = 240

9^x = 3

3^2x = 3¹

[ use, x^m = x^n then, m = n ]

2x = 1

x = 1/2

  =0.5