Question

please help mee to solve this​

Answer 1

Answer:

Sorry we have been in the future

Answer 2

Answer:

$3a + 4b = 16 \\ ab = 4 \\ \\ \\ {(3a + 4b)}^{2} = 256 \\ 9 {a}^{2} + 4 {b}^{2} + 2(3a)(4b) = 256 \\ 9 {a}^{2} + 4 {b}^{2} = 256 - 24(4) \\ 9 {a}^{2} + 4 {b}^{2} = 256 - 96 \\ 9 {a}^{2} + 4 {b}^{2} = 160$