Answer:
1.) disagree
2.) letter b costs more (not sure if I'm right)
Step-by-step explanation:
1.) (4x-7)(3x+7) using foil method, you will get 12x²+7x-49
while (4x+7)(3x-7) using the foil method, you will get 12x²-7x-49.
they are close but they are not the same, so disagree
2.) substitute the given value of x (which is 2) to the equations:
a.2(4x-7) pcs. at (2x+1) pesos each
2 [4(2)-7] pcs at 2(2)+1 pesos each
2 [8-7] pcs at 4+1 pesos each
2 [1] pcs at 5 pesos each
2 pcs at 5 pesos each
meaning 10 pesos ang nagastos niya kasi 2 ang binili niya
b. 3(4x-2) pcs. at (2x+1) pesos each
3 [4(2)-2] pcs at 2(2)+1 pesos each
3 [8-2] pcs at 4+1 pesos each
3 [6] pcs at 5 pesos each
18 pcs at 5 pesos each
meaning 90 pesos nagastos niya kasi 18 pcs binili niya
not sure if what i did was right
