Question

find each of the following product

(4x+5y)(4x-5y)

(3x^2+2y^2)(3x^2+2y^2)​

Answer 1

Answer:

$1) \: = (4x + 5y)(4x - 5y) \\ \: \: \: \: \: \: = (4x) {}^{2} - (5y) {}^{2} \\ \: \: \: \: \: \: = 16x {}^{2} - 25y {}^{2} \\ \\ 2) \: = (3x {}^{2} + 2y {}^{2} )(3x {}^{2} + 2y {}^{2} ) \\ \: \: \: \: \: \: = (3x {}^{2} + 2y {}^{2} ) {}^{2} \\ \: \: \: \: \: \: = 9x {}^{4} + 12x {}^{2} y {}^{2} + 4y {}^{4}$

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

1)=(4x+5y)(4x−5y)

=(4x)

2

−(5y)

2

=16x

2

−25y

2

2)=(3x

2

+2y

2

)(3x

2

+2y

2

)

=(3x

2

+2y

2

)

2

=9x

4

+12x

2

y

2

+4y

4