Question

. Find the values of the following expressions when x = 5.
(a) x-12
(b) 16 - 5x
(d) x3 - 5x2 - 7x + 33
(e) x2 + 2x + 1
(C) 3x + 9
(f) 13 - x2 - 2x​

Answer 1

(a) x-12=5-12=(-7)

(b) 16-5x=16-(5×5) =16-25=(-9)

(d) x3-5x2-7x+33=(5×3)-(5×5×2)-(7×5) +33=15-50-35+33=(-37)

(e) x2+2x+1=(5×2) +(2×5) +1=10+10+1=21

(c) 3x+9=(3×5) +9=15+9=24

(f) 13-x2-2x=13-(5×2) -(2×5) =13-10-10=13-20=(-7)

HOPE IT'S USEFUL☺☺☺