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= ( f(x) + g(x)) ( f(x) - g(x))
nilai dari
f(x) + g(x) = aˣ + a⁻ˣ + aˣ - a⁻ˣ
= 2aˣ
nilai dari
f(x) - g(x) = aˣ + a⁻ˣ -( aˣ - a⁻ˣ)
= aˣ + a⁻ˣ - aˣ + a⁻ˣ
=2a⁻ˣ
jawabnnya = ( f(x) - g(x)) ( f(x) - g(x))
= (2aˣ) ( 2a⁻ˣ)
= 4a ˣ⁻ˣ
= 4a