Question

hi. guys. please help me​

Answer 1

Answer:

339

Explanation:

when x=4

then ,7×4×4(3×4-9)+3= 339

Answer 2

Explanation:

by simplifying this equation, we get:

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

21x^3 -63x^2 + 3

if x=4, we get:

21(4^3) - 63(4^2)+3

21×64 - 63×16 +3

1344 - 1008 +3

336+3

339

i am not sure of calculations so please recheck