HCF of a3 –Bb3 and a2 – 4ab +4b2 is
A) a-2b
B) a2 + 2ab +b2
C) a + 2b
D) (a+2b)2
Explanation: factorizationof a3 – 8b3
a3 – (2b)3 = (a – 2b) (a2 + (a)(2b) +(2b)2)
=(a – 2b) (a2 + 2ab +4b2)
also
a2 – 4ab + 4b2 = a2 – 2 (a) (2b) +(2b)2
= (a – 2b)2
= (a – 2b) (a – 2b)
So HCF = common factors
= (a – 2b)
Daud
purchased a house for 1 million and sold for 1.1 million. How much profit did
he make?
a) 4 lac
b) 3 lac
c) 2 lac
d) 1 lac
Solution: Profit = S.P
Profit = 11 lac
Solve for x, |2x| = - 4
A) {2}
B) {-2}
C) {0}
D) { }
Explanation: Since absolute value can never be negative i.e. |x|, is also non-negative, so solution set is empty.
The line x = 4, parallel to
A) x – axis
B) y- axis
C) both x – axis and y - axis
D) Neither parallel to x –axis nor y- axis
Explanation: the line x=4 is parallel to y-axis.
تھکیں جو پاؤں تو چل سر کے بل ، نہ ٹھہر آتش ، اس مصرے میں خط کشیدہ تخلص کس شاعر کا ہے؟
A) مومن خان
B) خواجہ حیدر علی
C) میر تقی میر
D) ن م راشد
