Question

use direct method to evaluate (0.5-2a)*(0.5+2a)

Answer 1

Using the identity,

(a-b)(a+b)=a²-b²

Now, put the value and execute....

(0.5-2a)x(0.5+2a)=(0.5)²-(2a)²

(0.5-2a)(0.5+2a)=0.25 - 4a²

BE BRAINLY

Answer 2

Answer:

0.25-4a^write down steps your self