Question

a) (x+3)²
b) (x-y)²
c) (x+6) . (x-6)
d) (64a³bc):(-8ab)
e) (-49xy³):(7xy²)
f) 12x³ . (-7x²)
g) -7ab . (28a²b²c)
h) (-7x³)²
i) (m³n²)³
j) 5ax-3ax-6ax
k) (a+b) . (a-b)
l) (x+4)²
m) a³b+3a³b
n) -7xy+2xy

Answer 1

a) (x+3)²x² + 2.3x + 9
x² + 6x + 9
----------------------------
b)
(x - y)²
x² - 2xy + y²
----------------------------
c)
(x + 6). (x - 6)
x² - 6x + 6x - 36
x² - 36
----------------------------------
d)
(64a³bc):(-8ab)

64 a³ b c   =  - 8a²c
- 8 a  b
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e)
(- 49xy³) : (7xy²) =  - 7y
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f)
12x³ . (-7x²) = - 84x⁵
-----------------------------------------
g)
-7ab . (28a²b²c) =  - 196 a³b³c
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h)
(- 7x³)² = 49x⁶
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i)
(m³n²)³  =  m⁹n⁶
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j)
5ax - 3ax - 6ax = 2ax - 6ax = - 4ax
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k)
(a + b) .(a - b) = a² - b²
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l)
(x + 4)² = x² + 2.4x + 16 = x² + 8x + 16
-------------------------------------------------------------
m)
a³b + 3a³b = 4a³b
---------------------------------
n)
= - 7xy + 2xy = - 5xy