The coefficient of x in the expansion of (x + 5)3 is

We have,(x + 5)3 = x3 + (5)3 + 3 × x × 5 (x + 5)= x3 + 125 + 15x (x + 5)= x3 + 125 + 15x2 + 75x∴ Coefficient of x = 75Hence, option D is correct

Q12 of 274 Page 91

The coefficient of x in the expansion of (x + 5)³ is

We have,

(x + 5)³ = x³ + (5)³ + 3 × x × 5 (x + 5)

= x³ + 125 + 15x (x + 5)

= x³ + 125 + 15x² + 75x

∴ Coefficient of x = 75

Hence, option D is correct

One of the factors of (36x² – 1) + (1 + 6x)² is

If then (a³ – b³) = ?

is a polynomial of degree

One of the zeroes of the polynomial 2x² + 7x – 4 is