Question

please solve these questions​

Answer 1

Answer:

1.9x^2+6x+1-25y^2

=(3x)^2+2(3x)(1)+1^2-25y^2

=(3x+1)^2-(5y)^2

=(3x+1-5y)(3x+1+5y)

2. a^2 +b^2 +2ab+2bc+2ca

= (a+b)^2 + 2c(a+b)

=(a+b)(a+b+2c)