Factorise these and ill make u the brainliest

1.	Factorise these and ill make u the brainliest
Answer» Answer: 1) $5ab+6ca+7da\\a(5b+6c+7d)$ 2) $12ab+18cd+9c\\12ab+9c(2d+1)$ 3) $12a^2+36ab+27b^2\\3\left(4a^2+12ab+9b^2\right)\\3\left(2a+3b\right)\left(2a+3b\right)\\3\left(2a+3b\right)^2$ 4) $9a^2+12a+4\\\left(3a\right)^2+2\cdot \:3a\cdot \:2+2^2\\\left(3a+2\right)^2$ 5) Is this one WRITTEN correctly? $25b^2+4ab+16\\b(25b+4a)+16$ 6) $49z^2+70xz+25x^2\\(7z+5x)^2$ 7) $12a^2-27b^2\\3\left(4a^2-9b^2\right)\\3\left(2a+3b\right)\left(2a-3b\right)$ 8) $49c^2-36d^2\\\left(7c\right)^2-\left(6d\right)^2\\\left(7c+6d\right)\left(7c-6d\right)$ 9) $a^2c^2-b^2d^2\\\left(ac\right)^2-\left(bd\right)^2\\\left(ac+bd\right)\left(ac-bd\right)$ 10) $4z^2+44z+121\\\left(2z+11\right)^2$ 11) $9x^2+6x+1\\(3x+1)^2$ 12) $50a^2-72c^2\\25\cdot \:2a^2+36\cdot \:2c^2\\2\left(25a^2-36c^2\right)\\2\left(5a+6c\right)\left(5a-6c\right)$

Answer»

Answer:

$5ab+6ca+7da\\a(5b+6c+7d)$