(20+1)³ expand the following
Answers
Answered by
4
Step-by-step explanation:
(i) (2x+1)
3
=(2x)
3
+(1)
3
−3(2x)(1)(2x+1)
=8x
3
+1+6x(2x+1)=8x
3
+12x
2
+6x+1
(ii) (2a−3b)
3
=(2a)
3
−(3b)
3
+3(2a)(3b)(2a−3b)
=8a
3
+27b
3
−18ab(2a−3b)=8a
3
−27b
3
−36a
2
b+54ab
2
(iii) (
2
3
x+1)
3
=(
2
3
)x
3
+(1)
3
+3(
2
3
x)(1)(
2
3
x+1)
=
8
27
x
3
+1+
2
9
(
2
3
+1)=
8
27
x
3
+
4
27
x
2
+
2
9
x+1
(iv) [x−
3
2
y]
3
= x
3
−3×x
2
×
3
2
y+3×x×(
3
2
y)
2
+(
3
2
y)
3
=x
3
−2x
2
y+
3
4
xy
2
+
27
8
y
3
Answered by
0
Answer:
21 POWER 3, 63
Step-by-step explanation:
Chloroplasts are green because they contain the pigment chlorophyll, which is vital for photosynthesis.
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