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a. (X + 5)(X - 3) = x²+2x-15
cara : X dikali X + (X dikali -3) + 5 dikali X + 5 dikali -3
sehingga. X²+ (-3X)+5X-15 ⇒ X²+2X-15 (BERLAKU untuk semua nomor)
b. (2X + 3)(X - 4) = 2x²-5x-12
c. (2X + √5)(2X - √5) = 4x²-5
d. (4a + 5b)(4a - 5b) = 16a²-25b²
a. (x + 4)^ = x²+8x+16
cara : (x+4)(x+4) cara selanjutnya sama dengan yang diatas )
b. (2x + 5)^ = 4x²+20x+25
c. (2a + 3b)^ = 4a²+12ab+9b²
d. (6y + 5z)^ = 36y²+60yz+25z²
a. (× - 2)^ = x²-4x+4
b. (5y - 4)^ = 25y²-40x+16
c. (6x - 2y)^ = 36x²-24x+4
d. (8y - 3z)^ = 64y²-48yz+9z²
semoga membantu :)
b. (5y - 4)^ = 25y²-40x+16
c. (6x - 2y)^ = 36x²-24x+4
d. (8y - 3z)^ = 64y²-48yz+9z²