Question

Si a•b= 10 y a² + b² = 29, entonces el valor de (a-b)² es..
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Answer 1

Respuesta:

formula

${a}^{2} - 2ab + {b}^{2}$

${a}^{2} - 2(10) + {b}^{2}$

${a}^{2} - {b }^{2} + 20$

${a}^{2} - {b}^{2} = 29$

$29 + 20 = 49$