Question

si a² +b=34 y ab = 15,halla el valor de a-b

Answer 1

Explicación paso a paso:

$(a - b) {}^{2} = {a }^{2} - 2ab + {b}^{2} \\ (a - b) {}^{2} = 34 - 2(15) \\ (a - b) {}^{2} = 34 - 30 \\ (a - b) {}^{2} = 4 \\ (a - b) {} = \sqrt{4} \\ (a - b) = 2$