35x²+x-12=0 please help me fast
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Answered by
7
★Given equation,
35x²+x-12=0
First of all,let me say what a quadratic equation is,
•A quadratic polynomial of the form ax²+bx+c, represented by f(x),where f(x)=0 is known as Quadratic Equation
•There are three ways to solve a quadratic equation,
→Splitting the middle term
→Completing the square
→Quadratic Formula
We have,
35x²+x-12=0
On multiplying 35 and 12
We get the factors of their product as 5×7×3×4
Dividing the middle term in accordance with the factors
→35x²+21x-20x-12=0
→7x(5x+3)-4(5x+3)=0
→(5x+3)(7x-4)=0
→x= -3/5 or 4/7
The roots are -3/5 and 4/7
Answered by
2
Answer:
a=35,b=1,c=-12
sum=b=1
product=a×c=-12×35=-420
factors=21,-20
35x^2+21x-20x-12
=7x(5x+3)-4(5x+3)
=(7x-4) (5x+3)
now;(7x-4)=0
and(5x+3)=0
value of x will be=4/7 or -3/5
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