Question

guys i suck at math helppp me check the picture

Answer 1

Answer: $x^{2} +9x+20$

Step-by-step explanation:

Multiply the two sides given to find the area:

$(x+4)(x+5)\\x^2+5x+4x+20\\x^2+9x+20$

Polynomial in standard form means all terms are combined and exponents are in descending order.