" 20.Find the value of "(2.3a^(5)b^(2))times(1.2a^(2)b^(2))" ,when "a=1" and "b=0.5

Find the value of (2.3a^(5)b^(2)) xx(1.2 a^(2)b^(2)) when a = 1 and b = 0.5

Express each of the products as a monomials and verify the result in each case for x=1: Evaluate (2.3a^(5)b^(2))x(1.2a^(2)b^(2)) when a=1 and b=0.5

find the value of (2.8a^(2)b^(3))xx((3)/(7)ab)x(4ab^(2))=0. when a=0.5 and b=0.8

Find the value of 2a^2+b^2+5 when a=2 and b=-1

Find the value of (5a^6)\ xx\ (-10 a b^2)\ xx\ (-2. 1 a^2b^3)\ for \ a=1\ a n d\ b=1/2dot

Find the value of 12a^2+2ab+b^2 and a^3-b^3 when a=1, b=3.

Find the value of the expressions, when a= -1" and "b= 3 5a^(2)+4ab^(2)-8a^(2)b .

Find the value of ( ( 1/3 )^(-2) + ( 1/4 )^(-2) ) ÷ ( 1/5 )^(-2) ( a ) 0 ( b ) -1 ( c ) 1 ( d ) 7/5

Find the value of : (a) ((-2)/(3))^(5)times((-3)/(2))^(3) (b) ((3)/(4))^(3)-((1)/(2))^(3)