How do you simplify 3^-2+2^-332+23?

2 Answers
Dec 21, 2017

17/721772

Explanation:

Expression = 3^-2 + 2^-3=32+23

= 1/3^2 + 1/2^3=132+123

= 1/9 + 1/8=19+18

= (8+9)/(9xx8)=8+99×8

= 17/72=1772

Dec 21, 2017

As,

a^(-m)=1/(a^m)am=1am

3^(-2) + 2^(-3)32+23

darrcolor(white)(dddd)darrdddd

1/(3^2) color(white)(d)+ color(white)(d) 1/2^3132d+d123

As,

3^2=9,2^3=832=9,23=8

1/9+1/819+18

Now find the LCM.... it is 72

(1xx8)/(9xx8)+(1xx9)/(8xx9)1×89×8+1×98×9

8/72+9/72872+972

Add

17/721772