3.which of the following is TRUE?
a. (x+3)(x+9)=x²+27x+27
b. (x-2)(x+2)=x²-4
c. (y+1)(y+12)=y²+12x+27
d. (y-4)²=x²-4x+16

10.the product of (5x²-x+3)(8x-5) is?
a. 40x³+33x²+29x-15
b. 40x³+²-29x-15
c. 40x³-33x²+29x+15
d. 40x³-33x²+29x-15​