Question

ayuda plis es para hoy​

Answer 1

Explicación paso a paso:

$(x + y) ^{2} = {x}^{2} + 2 \times x \times y + {y}^{2} \\ ( {4}^{2} ) = {x}^{2} + 2 \times 3 + {y}^{2} \\ 16 = {x}^{2} + 6 + {y}^{2} \\ {x}^{2} + {y}^{2} = 10$