Question

(1+2x-3y)² expand it
it is easy peasy​

Answer 1

Answer:

$using \: \: (a + b - c) {}^{2} \\ = a {}^{2} + {b}^{2} - {c}^{2} + 2 ab- 2bc - 2ca \\ =( 1 {}^{2} +( 2x) {}^{2} - (3y) {}^{2} ) \\ = (1) {}^{2} + (2x) { }^{2} + {3y}^{2} + 2(1)(2x) \\ - 2(2x)(3y) - 2(3y)(1) \\ = 1 + 4x {}^{2} + {9y}^{2} + 4x - 12xy - 6y.$