Hi guys ... pls answer my question 5 (3x + y)² + 6 (3x + y) - 8. Best answer will get brainlist mark
cspatil75:
Factorise this expression
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Answered by
1
Answer :
Now, 5 (3x + y)² + 6 (3x + y) - 8
= 5 (3x + y)² + 10 (3x + y) - 4 (3x + y) - 8
= 5 (3x + y) (3x + y + 2) - 4 (3x + y + 2)
= (3x + y + 2) (15x + 5y - 4),
OR
Let t=3x+y giving
5(3x + y)^2 + 6(3x +y) - 8
=5t²+6t-8
=(5t-4)(t+2)
=(5(3x+y)-4)(3x+y+2)
=(15x+5y-4)(3x+y+2)
OR
The correct expression should be 5(3x + y)2 + 6(3x + y) - 8. It can be factorised as follows:
Let (3x + y) = z. Then, the expression becomes:
5z2 + 6z - 8
= 5z2 + 10z - 4z - 8
= 5z(z + 2) - 4(z + 2)
= (z + 2)(5z - 4)
= (3x + y + 2) [5(3x + y) - 4]
= (3x + y + 2) (15x + 5y - 4)
Now, 5 (3x + y)² + 6 (3x + y) - 8
= 5 (3x + y)² + 10 (3x + y) - 4 (3x + y) - 8
= 5 (3x + y) (3x + y + 2) - 4 (3x + y + 2)
= (3x + y + 2) (15x + 5y - 4),
OR
Let t=3x+y giving
5(3x + y)^2 + 6(3x +y) - 8
=5t²+6t-8
=(5t-4)(t+2)
=(5(3x+y)-4)(3x+y+2)
=(15x+5y-4)(3x+y+2)
OR
The correct expression should be 5(3x + y)2 + 6(3x + y) - 8. It can be factorised as follows:
Let (3x + y) = z. Then, the expression becomes:
5z2 + 6z - 8
= 5z2 + 10z - 4z - 8
= 5z(z + 2) - 4(z + 2)
= (z + 2)(5z - 4)
= (3x + y + 2) [5(3x + y) - 4]
= (3x + y + 2) (15x + 5y - 4)
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Hi Guys
Can u (√5)^-3 × (√2)^-3 plz answer
I posted but no one answered
Answered by
4
Answer:(3x+y+2)(15x+5y-4)
Step-by-step explanation:
Let (3x+y) be a
5a²+6a-8
5a²+10a-4a-8
=5a(a+2)-4(a+2)
= (a+2)(5a-4)
After substituting the value of a,
Answer=(3x+y+2)(15x+5y-4)
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