Multiply (w+1/5)(w+1/5)?

(w + 1/5)(w + 1/5)
= w*w + 1/5*w + w*1/5 + 1/5*1/5
= w^2 + w/5 + w/5 + 1/25
= w^2 + 2w/5 + 1/25

this is tough. attempt a collection of substitutions like this: y = 8 - 2x (fixing for y on the 1st one) then placed that into the 2d (8 - 2x) + 3z = 5 z= a million - 2w (fixing for z interior the 0.33 one) now placed that into the 2d additionally 8 - 2x + 3(a million-2w) = 5 we'd like each little thing in terms of x, so sparkling up for w 5w= 9 - 3x w = (9-3x)/5 No plug that into the 2d equation as quickly as lower back 8 - 2x + 3( a million - 2(9-3x)/5) = 5 8 - 2x + 3 - fifty 4/5 + 18x/5 = 5 -2x + 18x/5 = 5 - 8 + fifty 4/5 -8x/5 = sixty 9/5 x= -sixty 9/5 something is greater basic Plug x into the 1st equation 2(-sixty 5/5) + y = 8 y= 8 + one hundred thirty/5 y= 34 Plug y into the 2d equation 34 + 3z = 5 3z = -29 z = -29/3 Now plug z into the 0.33 equation -29/3 + 2w = a million 2w = 35/5 w= 35/10 = 7/2

You're correct

Yes.

w² + (2/5) w + 1/25
Agreed !

yes correct

ya it is correct.
only use (a+b)^2 formula

It is w^2+2/5w+1/25 = You are correct!

Use the mathematical formula (a + b)^2 = a^2 + 2ab + b^2.
And ur answer is CORRECT

thats correct