Question

Factories the expression 9a^2+42ab+49b^2

Answer 1

Answer:

$(3a + 7b) {}^{2}$

Step-by-step explanation:

$= 9a {}^{2} + 42ab + 49b {}^{2} \\ =( 3a {)}^{2} + 2 \times 3a \times 7b +( 7b {)}^{2} \\ =( 3a + 7b {)}^{2}$

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Answer 2

Answer:

it is right answer and explained