83
73
53
23
Correct answer is A
x2 + kx + 169; Perfect square
But, b2 - 4ac = 0, for a perfect square
where a - 1; b = k; c = 169
k2 - 4(1) x 169 = 0
k2 - 649 = 0
k2 = 649
k = √649
k = 83
The diagram is a circle with centre P. PRST are points on the circle. Find the value of < PRS ...
What is log7(49a) - log10(0.01)?...
3% of a family's income is spent on electricity, 59% on food, 20% on transport, 11% on education...
In the diagram above. |AB| = 12cm, |AE| = 8cm, |DCl = 9cm and AB||DC. Calculate |EC| ...