You! (i already got 4/7 marks for writing btw! ) : x²+12x-220=0-0x²+12x-220(x−10)(x+22 )

V = 4(x+1)(x + 11) = 924 → ( divide both sides by 4)

(x + 1)(x + 11) = 231  → ( expand and rearrange )

x² + 12x + 11 - 231 = 0

x² + 12x - 220 = 0 → ( factoring gives )

(x - 10)(x + 22) = 0 → ( equate each factor to zero and solve for x )

x - 10 = 0 ⇒ x = 10

x + 22 = 0 ⇒ x = - 22

but x > 0 ⇒ x = 10

dimensions of cuboid are 4 cm, 11 cm , 21 cm

check → 4 × 11 × 21 = 924 ' the volume of the cuboid '

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step-by-step explanation:

they are simplified

step-by-step explanation: