Question

if a =1, b= -2 and c= 3 find the value of (i) 3ab4-15a2b+4c​

Answer 1

Answer:

$a = 1 \\ b = - 2 \\ c = 3 \\ 3ab {}^{4} - 15a {}^{2} b +4 c \\ = 3 \times 1 \times - 2 {}^{4} - 15 \times 1 {}^{2} \times (- 2) + 4 \times 3 \\ = 48 + 30+12\\ = 90$