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=sisi×sisi
=(x+2)(x+2)
=xkuadrat +2x + 2x + 4
=xkuadrat + 4x + 4
semoga bermanfaat :)
maaf kalau salah ^_^
= (x + 2 ). (x +2)
= x² + 2x + 2x + 4
= x² + 4x + 4
Maaf klo salah :)