Question

Factorise 49x²+9y²+42xy

Answer 1

Answer:

(7x+3y)²

Step-by-step explanation:

49x²+9y²+42xy

by looking we can undertand it is the identity = a²+2ab+b²= (a+b)²

so √49x² = 7x = (7x)²

√9y²=3y=(3y)²

and 42xy= 2x7xx3y ( 2ab from the above formula)

so the answer is (7x + 3y)² = 49x² + 9y²+ 42xy

hope you understood please mark as brainliest

Answer 2

Answer:

$49x {}^{2} + 42xy + 9y {}^{2} \\ (7x ){}^{2} + 2 \times 7x \times 3y + (3y) {}^{2} \\ (7x + 3y) {}^{2} \\ (7x + 3y)(7x + 3y)$

plz mark it as brainliest answer plzzz