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x-> 4 2-√x
= lim x^2-3x-4 × 2+√x
x-> 4 2-√x 2+√x
= lim (x-4) (x+1) (2+√x)
x-> 4 4-x
= lim (x+1) (2+√x)
x-> 4 -1
= (4+1) (2+√4)
-1
= -(5 . 4)
= -20
Semoga membantu ^_^
x⇒4 2 - √x x⇒4 (2 - √x)(2 + √x)
= Lim ( x - 4)(x + 1)( 2 + √x)
x⇒4 (2 - √x)(2 + √x)
= Lim -( 4 - x)(x + 1)( 2 + √x)
x⇒4 (4 - x)
= lim -(x + 1)( 2 + √x)
x⇒4
= -(4 + 1)(2 + √4)
= - 5(2 + 2)
= -20