Consider the polynomial 9x2 - 16.
What is the value of ac?
ac
What is the value of b?
b
What two numbers multiply to get ac and add to get b?
The factored form of 9x2 - 16 is
ax2 + bx + c
The value of B is zero, since there is no B (b is x, (note not x², but only 1 x))
hope this helps
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