Answers

  • Brainly User
2015-06-09T12:24:35+05:30
1-(3x+5y)^2-4z^2
=(3x+5y)^2-4z^2
=(3x+5y)^2−2^2 X z^2
=(3x+5y−2z)(3x+5y+2z)

2-25/4x^2-y^2/9
=25/4x^2-y^2/9
=[(5^2/2^2)x^2]-[y^2/3^2]
=[5^2 X x^2/2^2]-[y^2/3^2]
=(15x−2y)(15x+2y)/(2^2 X 3^2)
=− (2 X y−15 X x ) X (2 X y+15 X x )/36

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