Question

Разложить на множители
1) b^2-16
2) a^2+6a+9
3) 49a^2b^4-100c^4
4) (x+1)^2 + (x-1)^2

Answer 1

1) b^2 - 16 = ( b - 4 )( b + 4 )
2) a^2 + 6a + 9 = ( a + 3 )( a + 3 )
3) 49a^2b^4 - 100c^4 = (7ab^2 - 10c^2 )( 7ab^2 + 10c^2 )
4) ( X + 1 )^2 + ( X - 1 )^2 = x^2 + 2x + 1 + x^2 - 2x + 1 = 2x^2 + 2 = 2( x^2 + 1 )