Question

factorise: x^2+6x+9-4y^2​

Answer 1

Heya...

$x {}^{2} + 3x + 3x + 9 - 4y {}^{2}$

$x(x + 3) + 3(x + 3) - 4y {}^{2}$

$(x + 3) {}^{2} - 4y {}^{2}$

Using

$(a + b)( a - b) = a { }^{2} - b {}^{2}$

$(x + 3) {}^{2} - (2y) {}^{2}$

$(x + 3 + 2y)(x + 3 - 2y)$

Hope it helps

$<marquee > prabhudutt$