Question

1.   If (x+1) is a factor of x2 – 4Ax +4A – 7 then find the value of A (1)​

Answer 1

Answer:

A(1) =2

Step-by-step explanation:

check photo for clear explanation

Answer 2

Answer:-

• If x+1 is a factor then x=-1

$\\ \sf\longmapsto P(x)=x^2-4Ax+4A-7$

• P(-1)=0

$\\ \sf\longmapsto (-1)^2-4A(-1)+4A-7=0$

$\\ \sf\longmapsto 1+4A+4A-7=0$

$\\ \sf\longmapsto 8A-6=0$

$\\ \sf\longmapsto 8A=6$

$\\ \sf\longmapsto A=\dfrac{6}{8}$

$\\ \sf\longmapsto A=\dfrac{3}{4}$