Workshop Calculation And Science algebra Page-4 Question Bank

16.  Which is the expansion of (a+b+c)2
(a+b+c)2 का विस्तार होगा?  [Bharat Skill QB]

(A) a2+b2+c2+2(ab+bc+ca)
(B) a2+b2+c2-2ab+2bc+2ca
(C) a2+b2+c2+2ab-2bc+2ca
(D) a2+b2-c2+2ab+2bc+2ca

17.  What is the value of x2-y2 if (x+y)=9, (x-y)=4?
यदि (x+y)=9, (x-y)=4 तो x2-y2 का मान क्या होगा?  [Bharat Skill QB]

(A) 13
(B) 65
(C) 36
(D) 46

18.  What is the value of a2+b2 if a+b=9 and ab=20?
a+b=9 और ab=20 हो तो a2+b2 का मान क्या होगा?  [Bharat Skill QB]

(A) 121
(B) -121
(C) 41
(D) -41

19.  What is the value of x3+3y2x2 if x=3, y=2?
यदि x=3, y=2 हो तो x3+3y2x2 का मान क्या होगा?  [Bharat Skill QB]

(A) 135
(B) 81
(C) 54
(D) 63

20.  What are the three consecutive numbers if their sum is 42
यदि राशि 42 है तो लगातार तीन संख्याएँ क्या है?  [Bharat Skill QB]

(A) 11, 12, 13
(B) 12, 13, 14
(C) 13, 14, 15
(D) 14,15, 16