Question

yaar koi help kar do mari ​

Answer 1

$\huge{ \sf \color{lightgrey}{answer} \color{lightpink} {\ :}}$

$\large \boxed{1}$

$\begin{aligned} & \quad \: \: ax - bx -ay + by \\ &= ax - ay - bx + by \\ &= a(x - y) - b(x - y) \\ &= (x - y)(a - b) \end{aligned}$

$\large \boxed{2}$

$\begin{aligned} & \quad \: \: pq + qr - pr - {r}^{2} \\ &= pq - pr + qr - {r}^{2} \\ &= p(q - r) + r(q - r) \\ &= (q - r)(p + r) \end{aligned}$

$\large\boxed{3}$

$\begin{aligned} & \quad \: \: {(x - y)}^{2} + 2x - 2y \\ &= (x - y)(x - y) + 2(x - y) \\ &= (x - y)(x - y + 2) \end{aligned}$

$\large\boxed{4}$

$\begin{aligned} & \quad \: \: ( {a}^{2} - {b}^{2})c + ( {b}^{2} - {c}^{2})a \\ &= {a}^{2} c - {b}^{2} c + a {b}^{2} - a {c}^{2} \\ &= {a}^{2}c + a {b}^{2} - a {c}^{2} - {b}^{2}c \\ &= a(ac - {b}^{2} ) - c(ac - {b}^{2}) \\ &= (ac - {b}^{2} )(a - c) \end{aligned}$

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Answer 2

Answer:

Soil erosion is the removal of soil by the forces of nature like wind and water,more rapidly than the various soil forming process can replace it." Generally, there is a balance between soil forming process and erosional process. The balance can be disturbed by natural or human factors.

Step-by-step explanation:

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