MATHS ASSIGNMENT
1) simplify: 52.36+19.35-4.79
2) simplify:;(5.7-2.7)×4.5
3) solve the equation: 4(y+6)=2
4) Evaluate: a³ +3b+2c If a =2 b=-2 c=4
5) find the degree of the polynomial: x³+x²+x+3
6) find the coefficient of x²: -3x²yz
7) find the constant and variable term: 5c-6
8) write the degree of term: 5x²y²z
9) the product of two rational number is -8/7 if one of the number is 2/9. find the other.
10) change into standard form: 60/-48
11) the sum of two rational number is -2 if one of them is - 3 /5. find the other.
12) without actual division find which is terminating: 1)7/20 2)-11/13
13) what must be added to 4x²+7x+6 to get the sum 6x²+5x-2
14)IfA=3x²-7x+6
B=-5x² +7x+7
C=7x²-2x-6 .Find A+2B-3C
15) A number multiplied by itself is 64 find the number.
Answers
Answered by
1
Answer:
Correct option is
A
4a
2
+9b
2
+c
2
+12ab−6bc−4ca
According to the identity: (a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
Hence (2a+3b−c)
2
=(2a)
2
+(3b)
2
+(−c)
2
+2×(2a)(3b)+2×(3b)(−c)+2×(2a)(−c)
=4a
2
+9b
2
+c
2
+12ab−6bc−4ca
Was this answer helpful?
Answered by
1
Answer:
Answer:
Correct option is
A
4a
2
+9b
2
+c
2
+12ab−6bc−4ca
According to the identity: (a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
Hence (2a+3b−c)
2
=(2a)
2
+(3b)
2
+(−c)
2
+2×(2a)(3b)+2×(3b)(−c)+2×(2a)(−c)
=4a
2
+9b
2
+c
2
+12ab−6bc−4ca
hopefully this was helpfull
Step-by-step explanation:
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