factorise x^2-3 root 5-20
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Verified answer
Answer:
Question:-
x²-3√5x-20
Step-by-step explanation:
Solution:-
We use the factorisation method,Picking the middle term as the sum and the other two numbers as the product of the equation.
x²-3√5x-20
Sum=-3√5
Product=-20×1---(x)
=>-20=Product
-4√5×√5=-4×5=-20==>Product
-4√5+√5=-3√5==>Sum
=} x²-4√5x+√5x-20=0
x(x-4√5)+√5(x-4√5)=0
x+√5=0,x=-√5
x-4√5=0,x=4√5
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Answer:
refer to the above attachment for the solution