Question

M +N = 5

mn = 2

Hallar
M² + N²​

Answer 1

Explicación paso a paso:

$(m + n) ^{2} = (5) ^{2}$

${m}^{2} + 2mn + {n}^{2} = 25$

${m}^{2} + 2(2) + {n}^{2} = 25$

${m}^{2} + 4 + {n}^{2} = 25$

${m}^{2} + {n}^{2} = 25 - 4$

${m}^{2} + {n}^{2} = 21$