Question

8. (5x – 6)(6 + 5x) 9. (7y+8)(8 – 7y) 10. (9q- 10p)(9q +10p) 11. (12r +13s)(13s – 12r) 11. (0,1 - x)(0,1 + х) 12. (0,2 + у)(0,2 – у) 13. (0,3 – а)(а + 0,3) 14. (в2 + 0,4)(в2 – 0,4) 15. (0,5х 2+ 0,6у)(0,5х2 – 0,6у) 16. (0,7а 3 – 1,2в)(1,2в + 0,7а3 ) 17. (1,3 х + 1,4у4)(1,3х – 1,4у4) 18. (1,5к 2– 1,6р2)(1,6р2 +1,5к2)

Answer 1

Ответы с решением на фото

Answer 2

Ответ:

a^2 - b^2 = (a+b)(a-b)

Объяснение:

Просто подставь значения в формулу выше и всё!

Answer 3

It looks like you have provided various algebraic expressions for multiplication. To simplify these expressions, we can use the distributive property. I'll simplify each expression for you:

8. (5x – 6)(6 + 5x) = 5x * 6 + 5x * 5x - 6 * 6 - 6 * 5x = 30x + 25x^2 - 36 - 30x = 25x^2 - 36

9. (7y + 8)(8 – 7y) = 7y * 8 - 7y * 7y + 8 * 8 - 8 * 7y = 56 - 49y^2 + 64 - 56y = -49y^2 - 56y + 120

10. (9q - 10p)(9q + 10p) This is the difference of squares. = (9q)^2 - (10p)^2 = 81q^2 - 100p^2

11. (12r + 13s)(13s - 12r) This is the difference of squares. = (13s)^2 - (12r)^2 = 169s^2 - 144r^2

12. (0.1 - x)(0.1 + x) This is also the difference of squares. = (0.1)^2 - (x)^2 = 0.01 - x^2

13. (0.3 - a)(a + 0.3) This is the difference of squares. = (0.3)^2 - (a)^2 = 0.09 - a^2

14. (b^2 + 0.4)(b^2 - 0.4) This is the difference of squares. = (b^2)^2 - (0.4)^2 = b^4 - 0.16

15. (0.5x^2 + 0.6y)(0.5x^2 - 0.6y) This is the difference of squares. = (0.5x^2)^2 - (0.6y)^2 = 0.25x^4 - 0.36y^2

16. (0.7a^3 - 1.2b)(1.2b + 0.7a^3) This is the difference of squares. = (0.7a^3)^2 - (1.2b)^2 = 0.49a^6 - 1.44b^2

17. (1.3x + 1.4y^4)(1.3x - 1.4y^4) This is the difference of squares. = (1.3x)^2 - (1.4y^4)^2 = 1.69x^2 - 1.96y^8

18. (1.5k^2 - 1.6p^2)(1.6p^2 + 1.5k^2) This is the difference of squares. = (1.5k^2)^2 - (1.6p^2)^2 = 2.25k^4 - 2.56p^4

I've simplified each expression based on the type of factors involved. If you have any specific values for the variables (like x, y, q, r, a, b, etc.), you can substitute those values to obtain numerical results.