Question

determine os zeros da função f(×) = 4ײ - 16 :

a ) S={3,4}

b ) S={8,-8}

c ) S={2,2}

d ) S={2,-2}
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Answer 1

d ) S={2,-2}

y = 4x² - 16

4x² - 16 = 0

4x² = 16

x² = 4

x = √4

x = ±2