\[ (x+4)(x+3) \] Part 5: Perfect Squares a) $x^{2}+6 x+9$ Part 6 Combos a) $16 x^{2}+26 x-12$

Step 1 ：Expand the expression $(x+4)(x+3)$ using the distributive property (FOIL method): \(x^2 + 7x + 12\)

Step 2 ：The expression $x^2 + 6x + 9$ is already in its simplest form: \(x^2 + 6x + 9\)

Step 3 ：Factor out the greatest common divisor (GCD) of the coefficients in the expression $16x^2 + 26x - 12$: \(2(8x^2 + 13x - 6)\)

Step 4 ：\boxed{\text{Final Answer:}}

Step 5 ：1) Expanded form of $(x+4)(x+3)$: \(x^2 + 7x + 12\)

Step 6 ：2) Simplified form of $x^2 + 6x + 9$: \(x^2 + 6x + 9\)

Step 7 ：3) Factored form of $16x^2 + 26x - 12$: \(2(8x^2 + 13x - 6)\)