4aba−b
−4aba2−b2
−4aba−2−b
4aba−2−b−2
Correct answer is B
a−ba+b - a+ba−b = (a−b)2(a+b) - (a+b)2(a−b0
applying the principle of difference of two sqrt. Numerator = (a - b) + (a + b) (a - b) - (a + b)
= (a = b + a = b)(a = b - a = b)
2a(-2b) = -4ab
= −4ab(a+b)(a−b)
= −4aba2−b2
Use mathematical table to evaluate (cos40° - sin30°) ...
Calculate the area of an equilateral triangle of side 8cm ...
In this figure, PQ = PR = PS and SRT = 68<sup>o</sup>. Find QPS ...
A ladder 6m long leans against a vertical wall at an angle 53º to the horizontal. How high up t...
Convert 2710 to another number in base three...
A fair die is rolled once. What is the probability of obtaining a number less than 3? ...