Question

x+1 is a factor of 3x+k find k

Answer 1

x+1=0

x=-1

3*-1 + k = -3+k

k= 3

Answer 2

Answer:

(i) x2+x+k=0⇒(1)2+1+k=0⇒1+1+k=0⇒k=−2

(ii) 2x2+kx+2=0⇒2(1)2+k(1)+2=0⇒2+k+2=0⇒k=−2−2

(iii) kx2−2x+1=0⇒k(1)2−2(1)+1=0⇒k−2+1=0⇒k=2−1

(iv) kx2−3x+k=0⇒k(1)2−3(1)+k=0⇒k−3+k=0⇒2k=−3⇒k