Question

Plz answer correctly
Right answer will given brainliest.

Answer 1

Answer:

1.

$= x^{2} + y^{2} - 3 + x^{2} -5 + 8 - 5y^{2} \\= x^{2} + x^{2} + x^{2}+ y^{2} - 5y^{2} - 3 - 5 + 8\\= 3x^{2} - 4y^{2}$

2. = 3a - 5b + 7c - a + b - 3c

= 2a - 4b + 4c

3. (a)7^3 = 343

   (b)3^4 = 81

   (c) = 2^4 + 5^2

        = 16 + 25

        = 41

4.

$a) (1 + 1)*1\\= 2\\b) a^{10-8} *a^{5} \\a^{2+5}\\=a^{7}$

c) 9^{3*5-10}

=9^5

d) 9^11+11

9^22