Question

Slove this question with explainton
Wrong Answer ❌❌ = Report
Correct Answer ✅✅ = brainlist and thanks​

Answer 1

Answer:

(a) 9pq

= 9 (-4) (1)

= -36

(b)

$p {}^{2} - q {}^{2}$

$( - 4) {}^{2} - (1 {}^{2} )$

= 16 - 1

= 15

(c)

$2p {}^{2} + 7pq + q {}^{2}$

$2( - 4) {}^{2} + 7( - 4)(1) + (1) {}^{2}$

$32 + ( - 28) + 1$

$33 - 28$

$5$

(d)

$\frac{(p + q)}{(p - q)}$

$\frac{( - 4 + 1)}{( - 4 - 1)}$

$\frac{ - 3}{ - 5}$

$\frac{3}{5}$

Answer 2

$\text\color{green}{Question}$

9pq (if p = -4 and q = 1)

$\text\color{purple}{Answer}$

9 (-4)(1) = -36

$\text\color{green}{Question}$

p² - q² (if p = -4 and q = 1)

$\text\color{purple}{Answer}$

(-4)² - (1)² = (-4 +1) (-4 -1) = -3 × -5 = 15

《Identity Used : a² - b² = (a+b)(a-b)》

$\text\color{green}{Question}$

2p² + 7pq + q² (if p = -4 and q = 1)

$\text\color{purple}{Answer}$

2(-4)(-4) + 7(-4)(1) + (1)²

= 32 - 28 + 1 = 5

$\text\color{green}{Question}$

${\frac{p + q}{p - q}}$(if p = -4 and q = 1)

$\text\color{purple}{Answer}$

${\frac{-4 + 1}{-4 -1}}$ = ${\frac{-3}{-5}}$ = ${\frac{3}{5}}$

$\text\color{pink}\fbox{Useful ?? = Brainlist}$