Question

si a^2+b^2= 80 y ab= 32, calcula a+b​

Answer 1

Explicación paso a paso:

$(a + b) {}^{2} = a {}^{2} + 2ab + b {}^{2} \\ (a + b) {}^{2} = 80 + 32 \times2 \\ (a + b) {}^{2} = 144 \\ (a + b) = \sqrt{144 } = 12$