Solved on Feb 02, 2024

Expand the expression (a+2b)(4a+b)(a+2b)(4a+b).

STEP 1

Assumptions
1. We are given a binomial expression (a+2b)(a+2b).
2. We are given another binomial expression (4a+b)(4a+b).
3. We need to multiply these two binomials together.

STEP 2

To multiply two binomials, we use the distributive property (also known as the FOIL method in the context of binomials), which states that for any numbers or expressions xx, yy, zz, and ww:
(x+y)(z+w)=xz+xw+yz+yw(x + y)(z + w) = xz + xw + yz + yw

STEP 3

Using the distributive property, we multiply each term in the first binomial by each term in the second binomial.
(a+2b)(4a+b)=a(4a)+a(b)+2b(4a)+2b(b)(a+2b)(4a+b) = a(4a) + a(b) + 2b(4a) + 2b(b)

STEP 4

Calculate each product.
a(4a)=4a2a(4a) = 4a^2 a(b)=aba(b) = ab 2b(4a)=8ab2b(4a) = 8ab 2b(b)=2b22b(b) = 2b^2

STEP 5

Combine the products to get the final expanded form.
4a2+ab+8ab+2b24a^2 + ab + 8ab + 2b^2

STEP 6

Combine like terms. In this case, abab and 8ab8ab are like terms.
4a2+(1+8)ab+2b24a^2 + (1 + 8)ab + 2b^2

STEP 7

Add the coefficients of the like terms.
4a2+9ab+2b24a^2 + 9ab + 2b^2

STEP 8

Write the final simplified expression.
The product of the two binomials (a+2b)(4a+b)(a+2b)(4a+b) is 4a2+9ab+2b24a^2 + 9ab + 2b^2.

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