Question

8 x square -20 2x-21=0​

Answer 1

Answer:

21/88

Step-by-step explanation:

8 ka square is 8²

so , 8×8-20×2x-21=0

64-20×2x-21=0

44×2x-21=0

88x=0+21

x= 21/88

Answer 2

Given:

$\bold{8x^2-22x-21=0}$

To find:

factor=?

Solution:

In the given question there is some mistyping error so the correct equation is as follows:

$\Rightarrow 8x^2-22x-21=0\\\\\Rightarrow 8x^2-(28-6)x-21=0\\\\\Rightarrow 8x^2-28x+6x-21=0\\\\\Rightarrow 4x(2x-7)+3(2x-7)=0\\\\\Rightarrow (4x+3)(2x-7)=0\\\\\Rightarrow 4x+3= 0 \ \ \ and \ \ \ 2x-7=0\\\\\Rightarrow x= \frac{-3}{4} \ \ \ and \ \ \ x=\frac{7}{2}$

The final value is:$x=\frac{7}{2}$