Question

1.jabarkanla??
a.(2 + 3) (3x + 2)
b.(2y - 3)(4y - 1)
c.(b - 5)(b + 1)
d.(c + 6)(c - 6)
e.(5y -2 )(2z + 7)

2.jabarkanlah masing masing bentuk kuadrat berikut
a.(c + d )pangkat2
b.(a - y)pangkat 2
c.(2x + 5)pangkat 2
d.(3y - 2)pangkat2

3.sederhanakan masing masing bentuk berikut
a.(3a + 4b) + 2(a - 5b)
b.3(x + y) -(x - y)

Answer 1

1a) (2+3)(3x+2)
= 5(3x+2)
= 15x + 10
b) (2y - 3)(4y-1)
= 8y²-12y -2y +3
= 8y² - 14y + 3
c) (b-5)(b+1)
= b² - 5b + b -5
= b² -4b -5
d) (c+6)(c-6)
=c²+6c-6c -36
= c² - 36
e) (5y -2)(2z + 7)
= 10yz + 35y -4z + 14
2a) (c+d)²
= c² + 2dc + d²
b) (a-y)²
= a² - 2ay + y²
c) (2x+5)²
= 4x² + 20x + 25
d) (3y-2)²
= 9y² - 12y + 4
3a) (3a + 4b) + 2(a - 5b)
= 3a + 4b + 2a - 10b
= 5a -6b
b) 3(x+y) -(x -y)
= 3x + 3y -x + y
= 2x + 4y
= 2(x + 2y)