Answer:
h=5
l= 7
w=2
Step-by-step explanation:
h=(x-1) w=(x-2)
l=(x+3) v=42
v=lwh
42=(x+3)(x-2)(x-1)
42=(x³+x-6)(x-1)
42= x³-7x+6
x³-7x+6-42=0
factor
(x-4)(x²-14x+9)=0
x-4 =0 ,x²-14x+9=0
x=4 ,-2+¡√5,-2-¡√5
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Answers & Comments
Answer:
h=5
l= 7
w=2
Step-by-step explanation:
h=(x-1) w=(x-2)
l=(x+3) v=42
v=lwh
42=(x+3)(x-2)(x-1)
42=(x³+x-6)(x-1)
42= x³-7x+6
x³-7x+6-42=0
factor
(x-4)(x²-14x+9)=0
x-4 =0 ,x²-14x+9=0
x=4 ,-2+¡√5,-2-¡√5