The roots of $7x^2 + x - 5 = 0$ are a and b. Compute $(a - 4)(b - 4).$
PLS HELP
Using the Quadratic Formula with a = 7 b = 1 c = -5
x=−b±√b2−4ac2a
roots are x=0.776739 x=−0.919596
( .776739 -4)(-.919596 - 4 ) = .....................
No, you're supposed to use the vietas formula
Then THAT should be in your question post !
(a-4)(b-4) =
ab -4a - 4 b + 16
-5/7 - 4 (-1/7) + 16
-5/7 + 4/7 + 16 = -1/7 + 16 = 15 6/7
HOLY UR INSANe! First person to finally solve after 3 tries! noice man!
Welllll....you're welcome !
+37165 
