Arectangle has a height of 7x^2 and a width of 3x^2+8x+7.

express the area of the entire rectangle.

Step-by-step explanation:

Area of the rectangle =  height * width

   = 7x² * (3x² + 8x + 7)

  = 7x² * 3x² + 7x² * 8x + 7x² * 7

  = 21x⁴ + 56x³ + 49x²

step-by-step explanation:

the first 5 right here the next 5 i will upload as separate question

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680