Find the following products using suitable identities
1) (2x - 3y) (2x - 3y)
2) (3x + 5y)^2
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Answer:
1. 4x^2-12xy+9y^2
2. 9x^2+30xy+25y^2
Step-by-step explanation:
1. (2x-3y) (2x-3y)
=2x(2x-3y) 3y(2x-3y)
=4x^2-6xy-3y(2x-3y)
=4x^2-6xy-6xy+9y^2
=4x^2-12xy+9y^2
2. (3x+5y)(3x+5y)
=3x(3x+5y)+5y(3x+5y)
= 9x^2 +15xy+15xy+25y^2
= 9x^2+30xy+25y^2
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