Replace ∗ with a monomial to obtain an identity: (∗− 2m)^2 = 100–40m+4m^2 and (3a+2.5b)^2=9a^2+6.25b^2 + ∗

To obtain an identity replace * by 10 in first equation and * by 15ab in second equation.

Step-by-step explanation:

Monomial is an algebraic expression consisting of one term only.

Given monomial:

1)

We have to find the  value of * in above equation

Using identity

Comparing with given equation, we get

a= * , b = 2m

then apply the identity, we get

now again comparing with the given equation,

This gives * = 10 as

2)

We have to find the  value of * in above equation

Using identity

Comparing with given equation, we get

a= 3a , b = 2.5b

then apply the identity, we get

now again comparing with the given equation, we get * = 15ab

Thus, to obtain an identity replace * by 10 in first equation and * by 15ab in second equation.

33

step-by-step explanation: g=6

62.5 paisa

step-by-step explanation:

4000*70 = 280000

280000-(2000*90) = 100000

4000-2400 = 1600

100000/1600 = 62.5

( give brainliest)