Question

Q.5 If 5 is a zero of x³+ kx² + 2x +8 find k.
Q.6 IF (x-2) is a zero of of x³-4x² + kx -8 find k.
Q.7 If ( x-2) and (x +3) are factors of x³ + ax² +bx -30, find a and b.
Q.9 If a+b+c=9 and a²+b² +c² =35 find the value of a³ +5³ +0³ - 3abc,
Q.10 (x+2) is a factor of mx³+nx²+x-6. It leaves the remainder 4 when divided by (x-2).
Find m and n
Q.11 The polynomials kx³ + 3x² -3 and 2x3 – 5x + leaves the same remainder when
divided by (x-4). Find k.
Q.12Show that x-2 is a factor p(x)=x³-12x² + 44x-48.

PLS ANSWER THIS CORRECTLY OR ELSE I WILL REPORT YOU PLS ANSWER FAST IT'S URGENT ​

Answer 1

Answer:

5) put x=5 in equation and f(5)=0