(a + 1)(a + 5)
(a - 5)(7a - 1)
(a + 5)(7a + 1)
a(7a + 1)
Correct answer is C
(4a + 3)2 - (3a - 2)2 = a2 - b2
= (a + b)(a - b)
= [(4a + 3) + (3a - 2)][(4a + 3) + (3a - 2)]
= [(4a + 3 + 3a - 2)][(4a + 3 - 3a + 2)]
= (7a + 1)(a + 5)
∴ (a + 5)(7a + 1)
In a triangle PQT, QR = √3cm, PR = 3cm, PQ = 2√3cm and PQR = 30°. Find angle...
calculate the surface area of a sphere of radius 7cm [Take π = 22/7] ...
If the quadratic function 3x2 - 7x + R is a perfect square, find R...
In the diagram, O is the centre of the circle where OS//QR and ∠SOR = 35o...