Question

1)(a+b)(c+d) 2)(a+2)(b-c) 3)(a-1)(a+b-2) 4)(a-b)(a+b) 5)(a+b)(a+b) 6)(x+y)(z+t) умножение многочленов!

Answer 1

1)(a+b)(c+d)=ac+ad+bc+bd
2)(a+2)b-c)

Answer 2

To multiply the given polynomials, you can use the distributive property of multiplication over addition. Here are the results for each expression:

1. (a+b)(c+d) Result: ac + ad + bc + bd

2. (a+2)(b-c) Result: ab - ac + 2b - 2c

3. (a-1)(a+b-2) Result: a^2 + ab - 2a - a - b + 2

4. (a-b)(a+b) Result: a^2 + ab - ab - b^2 Simplified: a^2 - b^2

5. (a+b)(a+b) Result: a^2 + ab + ab + b^2 Simplified: a^2 + 2ab + b^2

6. (x+y)(z+t) Result: xz + xt + yz + yt

Remember to apply the distributive property, combining like terms if possible, to simplify the final expression when necessary.