Question

si a#b=(a-b)(a+b) halla el valor de K en (5#2)+K=(7#4)

Answer 1

a#b=(a-b)(a+b)                     a#b=(a-b)(a+b)

5#2=(5-2)(5+2)                     a#b=(7-4)(7+4)

5#2=(3)(7)                            a#b=(3)(11)

5#2=21                                 a#b=33

∵K=4#2

COMPROBAMOS:

4#2=(4-2)(4+2)

4#2=(2)(6)

4#2=12

∵12+21=33