Question

Tolong yang jago matematika nomer 3&4

Answer 1

3.
a) 3x (x - 4)
b) (x + 8) (x + 3)
c) (y + 8) (y - 5)
d) 2 (x + 10) (x + 3) = (x + 5) (2x + 3)

4.
a) L.Persegi Panjang
= P * l = (2x + 4) * (3x - 1) =6x^2 - 2x + 12x - 4 = 6x^2 + 10x -4 cm^2
L. Persegi
= sisi * sisi = (2x + 3) * (2x + 3) =4x^2 + 6x + 6x + 9 = 4x^2 + 12x + 9

b) Jumlah luas = L.Persgi Pan + L.Persgi
= (6x^2 + 10x - 4) + (4x^2 + 12x + 9)
= (6x^2 + 4x^2) + (10x + 12x) + (- 4 + 9)
= 10x^2 + 22x + 5 cm^2