why we need constitution
Answers
Answer:
A Constitution is necessary because of the following reasons: It is an important law of the land. It determines the relationship of the citizens with the governments. It lays down principles and guidelines which are required for people belonging to different ethnic and religious groups to live in harmony.
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Answer:
i)25−4x
2
−12xy−9y
2
=25−(4x
2
+12xy+9y
2
)
=5
2
−((2x)
2
+2×2x×3y+(3y)
2
)
=5
2
−(2x+3y)
2
=(5+2x+3y)(5−(2x+3y))
=(5+2x+3y)(5−2x−3y)
ii)x
2
−a
2
+10ab−25b
2
=x
2
−(a
2
−10ab+25b
2
)
=x
2
−(a
2
−2×a×5b+(5b)
2
)
=x
2
−(a−5b)
2
=(x+a−5b)(x−(a−5b))
=(x+a−5b)(x−a+5b)
iii)6xy+x
2
+9y
2
−4a
2
=(2×x×3y+x
2
+(3y)
2
)−(2a)
2
=(x+3y)
2
−(2a)
2
=(x+3y+2a)(x+3y−2a)
iv)9x
2
+4+12x−a
2
+2ab−b
2
=((3x)
2
+(2
2
)+2×3x×2)−(a
2
−2ab+b
2
)
=(3x+2)
2
−(a−b)
2
=(3x+2+a−b)(3x+2−(a−b))
=(3x+2+a−b)(3x+2−a+b)