Question

The sum of 3a(a+4) +5a2 is
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Answer 1

$3a(a + 4) + 5 {a}^{2}$

we will multiply 3a with the bracket

$3 {a}^{2} + 12a + 5 {a}^{2}$

$8 {a}^{2} + 12a$

we will take 4a common

$4a(2a + 3)$

Answer 2

$= 3a(a + 4) + 5 {a}^{2}$

$= 3 {a}^{2} + 12a + 5 {a}^{2}$

$= 3 {a}^{2} + 5 {a}^{2} + 12a$

$= 8 {a}^{2} + 12a$