Question

H.C.F of (a²+7a-18) and (a²+10a+9) is (a+9) then their L.C.M​

Answer 1

Answer:

(a²+7a-18)(a+1)

Step-by-step explanation:

hcf x lcm  = product of the number

(a+9) x lcm=(a²+7a-18) x (a²+10a+9)

(a+9) x lcm=(a²+7a-18) x (a²+9a+a+9)

(a+9) x lcm=(a²+7a-18) x [a(a+9)+1(a+9)]

(a+9) x lcm=(a²+7a-18) x (a+9)(a+1)

lcm=(a²+7a-18)(a+1)    [a+9 cancels each other]