Mathematics: Asoild cuboid has a length (x+5) cm, width (x+4) cm and hight 6cm. the surface area of the cuboid is 205cm2. show that x satisfies the equation 2x2 + 42x -57 = o.

Asoild cuboid has a length (x+5) cm, width (x+4) - id542582363, karlamiddleschool

Ответ:

jasbutt015p2pqp8

14.04.2021

$A=2(x+5)(x+4)+2(x+5)\cdot6+2(x+4)\cdot6\\
A=2x^2+8x+10x+40+12x+60+12x+48\\
A=2x^2+42x+148\\\\
2x^2+42x+148=205\\ \boxed{2x^2+42x-57=0}$

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Ответ:

tadvet1633

13.03.2023

Mathematics

Hi! I hope this is correct if not please let me know I am willing to redo it

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Asoild cuboid has a length (x+5) cm, width (x+4) cm and hight 6cm.
the surface area of the cuboid is 205cm2.
show that x satisfies the equation 2x2 + 42x -57 = o.

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