Question

(3x+1) (3x-8) help me and solve the problem please ​

Answer 1

Answer:

9x^2 -21x -8

Step-by-step explanation:

we know the formula (x+a) (x+b) = x^2 + x( a+b) +ab

now,

(3x+1) (3x+(-8)) ...........make "-8" as plus so thet we can use formula

here x = 3x, a= 1 , b= -8

so,

by using formula

(3x)^2 + 3x ( 1 -8) + (1×(-8)) ......(+ × - = - )

9x^2 + 3x(-7) -8

9x^2 - 21x -8

so the answer is 9x^2 - 21x -8